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204 results on '"Baldas, Lucien"'

5. Inertial migration of bidisperse suspensions flowing in microchannels: effect of particle diameters ratio

Author

Tohme, Tohme, Gao, Yanfeng, Magaud, Pascale, Baldas, Lucien, Lafforgue, Christine, and Colin, Stéphane

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Classical Physics
Abstract

Up to date, inertial migration of particles in microflows has demonstrated a great potential for a wide range of applications. In particular, this phenomenon is used to achieve particle separation or sorting in a suspension. Recent works reported that the focusing mode of particles can be modified in a polydisperse suspension. Nevertheless, the impact of the particle sizes in a mixture on their inertial migration has been rarely studied up to now. Thus, we have investigated in this work the influence of bidispersity on the lateral migration of the particles towards equilibrium positions and on their longitudinal ordering into trains. Different changes in the particles behavior were observed when the ratio between the particle sizes (dp1/dp2) varied from 1.64 to 4.58.

Published
2019

6. Proposed Design for Simultaneous Measurement of Wall and Near-wall Temperatures in Gas Microflows

Author

Yeachana, Varun, Kumar, Vikash, Baldas, Lucien, Rojas-Cárdenas, Marcos, Barrot, Christine, Enright, Ryan, and Colin, Stéphane

Subjects
Physics - Instrumentation and Detectors, Physics - Classical Physics
Abstract

Gas behavior in systems at microscale has been receiving significant attention from researchers in the last two decades [1-4]. Today, there is an enhanced emphasis on developing new experimental techniques to capture the local temperature profiles in gases at rarefied conditions. The main underlying reason behind this focus is the interesting physics exhibited by gases at these rarefied conditions, especially in the transition regime. There is the onset of local thermodynamic disequilibrium, which manifests as velocity slip and temperature jump [1-4] at the wall. However, there is limited experimental evidence on understanding these aforementioned phenomena. With the advances in experimental facilities, it is today possible, at least in principle, to map the local temperature profiles in gases at rarefied conditions. Molecular tagging approach is one such technique which has shown the potential to map the temperature profile in low pressure conditions [5]. In molecular tagging approach, a very small percentage of tracer molecules are introduced into the gas of interest, referred as carrier gas. In gas flow studies, the typical tracers employed are acetone and biacetyl. These tracer molecules, assumed to be in equilibrium with the carrier gas, are excited with a source of energy at a specific wavelength, typically a laser. The excited molecules are unstable and tend to de-excite in a radiative and non-radiative manner, which is manifested as fluorescence and phosphorescence. Following the deformation with time of a tagged line permits to obtain the flow velocity. In addition, the dependence of the phosphorescence and fluorescence intensity to the gas temperature could also allow to use this technique for local temperature measurements. The objective of this study is to develop an experimental setup capable of simultaneously mapping the wall and fluid near-wall temperatures with the final goal to measure temperature jump at the wall when rarefied conditions are reached. The originality of this setup shown in Figure 1 is to couple surface temperature measurements using an infrared camera with Molecular Tagging Thermometry (MTT) for gas temperature measurements. The bottom wall of the channel will be made of Sapphire substrate of 650 $\mu$m thickness coated with a thin film of Indium Tin Oxide (ITO). The average roughness of this ITO layer is about 3 nm. The top wall of the channel will be made of SU8 and bonded with the bottom wall with a layer of PDMS. The channel will be filled in with acetone vapor

Published
2019

7. Inertial migration of neutrally buoyant particles in square channels at high Reynolds numbers

Author

Wang, Yichang, Gao, Yanfeng, Magaud, Pascale, Baldas, Lucien, Lafforgue, Christine, and Colin, Stéphane

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Fluid Dynamics
Abstract

KEY WORDS suspensions, inertial focusing, particle-laden flows, high Reynolds numbers SHORT SUMMARY The inertial migration of particles in square channel flows at the micro-scale has been deeply investigated in the last two decades. The well-known four equilibrium positions are located near the center of each channel face at moderate Reynolds numbers [1]. More recently, Miura et al. [2] revealed experimentally the presence of eight equilibrium positions in millimetric square channels for Reynolds numbers higher than 250. The aim of the present work is to extend these results obtained at millimeter scale to the micrometer scale. To this end, in situ visualization of particles flowing in square micro-channels at Reynolds numbers ranging from 5 to 300 have been conducted and analyzed.

Published
2019

8. Recent developments in miniaturized optical systems for continuous fluorescence detection in liquid flows

Author

Mariuta, Daniel, Baldas, Lucien, Brander, Jürgen, Haas-Santo, Katja, Calvé, Stéphane Le, Colin, Stéphane, Magaud, Pascale, and Barrot-Lattes, Christine

Subjects
Physics - Applied Physics
Abstract

Miniaturization of continuous fluorescence detection is a challenging task due to the multiple and sensitive parameters intervening in the process. By analyzing fluorescence sensing architectures proposed during the last two years, this work has the goal to identify some trends in the process of fluorescence miniaturization for in-time liquid detection. A lack of postulated strategies regarding the miniaturization process was observed and this review tries to answer partially to this need. The identified integration strategies excel in fulfilling partially the desired functions of a fully autonomous miniaturized detector and further research is needed in order to develop sensing micro-system being capable to step outside of the lab world.

Published
2019

16. Gas Flows in Microsystems

Author

Colin, Stéphane and Baldas, Lucien

Abstract

The last two decades have witnessed a rapid development of microelectromechanical systems (MEMS) involving gas microflows in various technical fields. Gas microflows can, for example, be observed in microheat exchangers designed for chemical applications or for cooling of electronic components, in fluidic microactuators developed for active flow control purposes, in micronozzles used for the micropropulsion of nano and picosats, in microgas chromatographs, analyzers or separators, in vacuum generators and in Knudsen micropumps, as well as in some organs-on-a-chip, such as artificial lungs. These flows are rarefied due to the small MEMS dimensions, and the rarefaction can be increased by low-pressure conditions. The flows relate to the slip flow, transition or free molecular regimes and can involve monatomic or polyatomic gases and gas mixtures. Hydrodynamics and heat and mass transfer are strongly impacted by rarefaction effects, and temperature-driven microflows offer new opportunities for designing original MEMS for gas pumping or separation. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on novel theoretical and numerical models or data, as well as on new experimental results and technics, for improving knowledge on heat and mass transfer in gas microflows. Papers dealing with the development of original gas MEMS are also welcome.

Published
2019

19. Pulsed impinging jets for heat transfer: a short review

Author

Saliba, Georges, Batikh, Ahmad, Colin, Stéphane, Baldas, Lucien, Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), and Institut Catholique d'Arts et Métiers (ICAM)

Subjects
[PHYS]Physics [physics]
Abstract

International audience; Abstract Because of their effectiveness and adaptability, impinging jets have found their way into a host of applications ranging from cooling turbine blades, to heat management of electronic systems or even lowering the temperature of a hot cup of coffee in the morning. With constantly increasing demand for efficient and compact cooling systems in certain industries, such as the aerospace or electronics industries, variations on the textbook-setup of an impinging jet have been studied over the years. One such variation introduces a periodic disturbance into the jet that can have an effect on both the structure of flow and the thermal boundary layer at the target surface. In what follows is a short overview of studies having used pulsed jets, often in tandem with other modifications, to try and improve heat transfer. Special attention was also given to the methods by which the periodic disturbance can be produced since they involve setups of different levels of complexity and having different implementation costs.

Published
2023
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20. Review of Optical Thermometry Techniques for Flows at the Microscale towards Their Applicability to Gas Microflows

Author

European Commission, Ministerio de Ciencia e Innovación (España), Colin, Stéphane [0000-0003-3434-3848], Fernández Sánchez, José María [0000-0002-6636-7978], Barrot, Christine [0000-0001-6352-1792], Baldas, Lucien [0000-0001-7577-4463], Rojas-Cárdenas, Marcos [0000-0001-8837-9550], Colin, Stéphane, Fernández Sánchez, José María, Barrot, Christine, Baldas, Lucien, Bajić, Slaven, Rojas-Cárdenas, Marcos, European Commission, Ministerio de Ciencia e Innovación (España), Colin, Stéphane [0000-0003-3434-3848], Fernández Sánchez, José María [0000-0002-6636-7978], Barrot, Christine [0000-0001-6352-1792], Baldas, Lucien [0000-0001-7577-4463], Rojas-Cárdenas, Marcos [0000-0001-8837-9550], Colin, Stéphane, Fernández Sánchez, José María, Barrot, Christine, Baldas, Lucien, Bajić, Slaven, and Rojas-Cárdenas, Marcos

Abstract

Thermometry techniques have been widely developed during the last decades to analyze thermal properties of various fluid flows. Following the increasing interest for microfluidic applications, most of these techniques have been adapted to the microscale and some new experimental approaches have emerged. In the last years, the need for a detailed experimental analysis of gaseous microflows has drastically grown due to a variety of exciting new applications. Unfortunately, thermometry is not yet well developed for analyzing gas flows at the microscale. Thus, the present review aims at analyzing the main currently available thermometry techniques adapted to microflows. Following a rapid presentation and classification of these techniques, the review is focused on optical techniques, which are the most suited for application at microscale. Their presentation is followed by a discussion about their applicability to gas microflows, especially in confined conditions, and the current challenges to be overcome are presented. A special place is dedicated to Raman and molecular tagging thermometry techniques due to their high potential and low intrusiveness.

Published
2022

24. High-Fidelity Large-Eddy Simulation of a Pulsed Jet Actuator

Author

Yalc, Özgür, Gloerfelt, Xavier, Saliba, Georges, Batikh, Ahmad, Baldas, Lucien, Laboratoire de Dynamique des Fluides (DynFluid), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Europe H2020 CleanSky, ERCOFTAC, and European Project: 887010,H2020 CleanSky 2,H2020-CS2-CFP10-2019-01,PERSEUS(2020)

Subjects
[PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph]
Abstract

International audience

Published
2022

27. Optimizing the internal design of a miniaturized fluidic oscillator for active flow control over a scaled NACA-4412

Author

Lopez Quesada, Guillermo, Batikh, Ahmad, Orieux, Stéphane, Mazellier, Nicolas, Baldas, Lucien, Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institut Catholique d'Arts et Métiers (ICAM), Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), and European Project: 887010,H2020 CleanSky 2,H2020-CS2-CFP10-2019-01,PERSEUS(2020)

Subjects
[PHYS]Physics [physics], [PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn]
Abstract

International audience; The detachment of the boundary layer over the wing of an aircraft and its detrimental effects during the critical phases of the flight (mainly takeoff and landing) has been extensively studied [1]. Controlling the separation of the boundary layer decreases the energy consumption (and consequently CO2 emissions) while also improving the maneuvering capability, safety, and durability of the aircraft by suppressing instabilities. Active flow control by means of pulsed jets along the span of the wing can be used to compensate for the momentum deficit in the boundary layer to delay its detachment from the airfoil [2]. However, implementing active flow control devices leading to a net gain in the energy balance remains an open issue which the CleanSky PERSEUS project attempts to address. The focus of the presented work is on the design of the Pulsed Jet Actuators and the optimization of their internal geometry to provide a targeted performance over a scaled NACA-4412 airfoil.

Published
2022

28. Sensitivity analysis of the leading global modes of the flow around a NACA 4412 airfoil

Author

Nastro, Gabriele, Robinet, Jean-Christophe, Loiseau, Jean-Christophe, Passaggia, Pierre-Yves, Baldas, Lucien, Mazellier, Nicolas, Stefes, Bruno, Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire de Dynamique des Fluides (DynFluid), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Airbus Operations GmbH, and American Institute of Aeronautics and Astronautics

Subjects
Physics::Fluid Dynamics, [PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn]
Abstract

International audience; Two- and three-dimensional modes developing on a steady spanwise-homogeneous laminar separated flow over a NACA 4412 airfoil have been numerically investigated using global linear stability theory. Considering variations of both the Reynolds number and the angle of attack, the two-dimensional von Kármán mode results to be always the leading mode since for all conditions examined it is more unstable than the three-dimensional von Kármán modes and the three-dimensional stationary modes, associated with the formation on the airfoil surface of large-scale separation patterns akin to stall cells. Sensitivity of the global modes is investigated numerically through adjoint-based methods in order to predict regions of the flow which are most sensitive to a modification of the base flow and the application of a steady force. Interestingly, the instability’s growth rate sensitivity function displays an extended region upstream of the separation bubble wherein a streamwise oriented force has a net stabilizing effect. Aerodynamic performances can thus be possibly improved by leveraging the boat-tailing effect induced by tangential jet actuators localized in this particular region of the flow

Published
2022
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31. Design and evaluation of pulsed jet actuators network for active flow control on NACA-4412 profile

Author

Lopez Quesada, Guillermo, Batikh, Ahmad, Orieux, Stéphane, Mazellier, Nicolas, Baldas, Lucien, Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), GDR 2502 - Contrôle des Décollements, and European Project: 887010,H2020 CleanSky 2,H2020-CS2-CFP10-2019-01,PERSEUS(2020)

Subjects
Flow control, [SPI]Engineering Sciences [physics], Pulsed jet actuator, Fluidic oscillator
Abstract

International audience; The ongoing project (PERSEUS) is focused on the active flow control of the boundary layer detachment by means of a Pulsed Jet Actuator (PJA). The PJAs are to be implemented on a NACA-4412 profile fabricated at scale and tested in the wind tunnels capacities of UORL. This requires the miniaturization and redesigning of usual PJAs in order to fit the spatial and operational constraints of the mock-up.The workflow starts with a preliminary design of the PJAs with CFD simulations in order to estimate the performance in terms oscillatory frequency and average flow velocity at the outlet. Then the selected designs are fabricated with 3D printing and characterized by hot wire anemometry in order to compare with the numerical simulations. Finally the complete assembly of oscillators will be implemented in the wing airfoil for testing on the wind tunnel.

Published
2021

33. Selected Papers from the ISTEGIM'19 Thermal Effects in Gas Flow in Microscale

Author

Baldas, Lucien, Brandner, Jürgen, Morini, Gian, Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Karlsruhe Institute of Technology (KIT), Alma Mater Studiorum University of Bologna (UNIBO), Karlsruhe Institute of Technology, MDPI, European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)

Subjects
[PHYS]Physics [physics]
Abstract

International audience; This Special Issue will publish selected papers from the International Symposium on Thermal Effects in Gas flow in Microscale ISTEGIM 2019 - A MIGRATE Event (http://www.istegim.eu/), 24-25 October 2019, Ettlingen, Germany.MIGRATE (www.migrate2015.eu) is a H2020 Marie Skłodowska-Curie European Training Network, intended to address some of the current challenges to innovation that faces European industry with regard to heat and mass transfer in gas-based micro-scale processes. This network of 10 participants and 6 associated partners coming from all over the European Community covers different aspects of enhanced heat transfer and thermal effects in gases: from modelling of heat transfer processes and devices, development and characterization of sensors and measurement systems for heat transfer in gas flows as well as thermally driven micro gas separators, to micro-scale devices for enhanced and efficient heat recovery in environmental, transport, telecommunications and energy generation. The MIGRATE Project presents his 2-day symposium, ISTEGIM19, during which the members of the MIGRATE network will showcase the main achievements of the project. The program will include keynote lectures, invited lectures and contributed papers.

Published
2021
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35. Development of a microfluidic preconcentration device for sub-ppb level detection of BTEX

Author

Lara-Ibeas, Irene, Rodríguez-Cuevas, Alberto, Person, Vincent, Colin, Stéphane, Baldas, Lucien, Le Calvé, Stéphane, Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), In’Air Solutions [Strasbourg, France], European Project: 687014,H2020,H2020-CS2-CFP01-2014-01,MACAO(2016), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), BALDAS, Lucien, and Development of VOCs and ozone Micro-analysers based on microfluidic devices for Aircraft Cabin Air mOnitoring - MACAO - - H20202016-02-01 - 2019-07-31 - 687014 - VALID

Subjects
[CHIM.ANAL] Chemical Sciences/Analytical chemistry, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MECA.MEFL] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience

Published
2019

36. Optofluidic Formaldehyde Sensing: Towards On-Chip Integration

Author

Mariuta, Daniel, Govindaraji, Arumugam, Colin, Stéphane, Barrot, Christine, Le Calvé, Stéphane, Korvink, Jan G., Baldas, Lucien, Brandner, Jürgen J., Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Institute of Microstructure Technology [Eggenstein-Leopoldshafen, Germany] (IMT), Karlsruhe Institute of Technology (KIT), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Karlsruher Institut für Technologie (KIT), European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Colin, Stéphane, Research and training network on MIniaturized Gas flow for Applications with enhanced Thermal Effects - MIGRATE - - H20202015-11-01 - 2019-10-31 - 643095 - VALID, Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi)

Subjects
[PHYS]Physics [physics], metal-oxide-semiconductor (CMOS)-based fluorescence sensing, lcsh:Mechanical engineering and machinery, 3.5–diacetyl-1.4-dihydrolutidine (DDL), SU-8 2015 waveguide, light emitting diode (LED)-induced fluorescence, Article, [PHYS] Physics [physics], 5-diacetyl-1, 3,5–diacetyl-1,4-dihydrolutidine (DDL), silicon fluidic cell, 4-dihydrolutidine (DDL), lcsh:TJ1-1570, ddc:620, Engineering & allied operations
Abstract

Formaldehyde (HCHO), a chemical compound used in the fabrication process of a broad range of household products, is present indoors as an airborne pollutant due to its high volatility caused by its low boiling point ( T = &minus, 19 &deg, C). Miniaturization of analytical systems towards palm-held devices has the potential to provide more efficient and more sensitive tools for real-time monitoring of this hazardous air pollutant. This work presents the initial steps and results of the prototyping process towards on-chip integration of HCHO sensing, based on the Hantzsch reaction coupled to the fluorescence optical sensing methodology. This challenge was divided into two individually addressed problems: (1) efficient airborne HCHO trapping into a microfluidic context and (2) 3,5&ndash, diacetyl-1,4-dihydrolutidine (DDL) molecular sensing in low interrogation volumes. Part (2) was addressed in this paper by proposing, fabricating, and testing a fluorescence detection system based on an ultra-low light Complementary metal-oxide-semiconductor (CMOS) image sensor. Two three-layer fluidic cell configurations (quartz&ndash, SU-8&ndash, quartz and silicon&ndash, quartz) were tested, with both possessing a 3.5 &micro, L interrogation volume. Finally, the CMOS-based fluorescence system proved the capability to detect an initial 10 &micro, g/L formaldehyde concentration fully derivatized into DDL for both the quartz and silicon fluidic cells, but with a higher signal-to-noise ratio (SNR) for the silicon fluidic cell ( S N R s i l i c o n = 6.1 ) when compared to the quartz fluidic cell ( S N R q u a r t z = 4.9 ). The signal intensity enhancement in the silicon fluidic cell was mainly due to the silicon absorption coefficient at the excitation wavelength, &nbsp, a ( &lambda, a b s = 420 &nbsp, nm ) = 5 &times, 10 4 &nbsp, cm &minus, 1 , which is approximately five times higher than the absorption coefficient at the fluorescence emission wavelength, a ( &lambda, e m = 515 &nbsp, nm ) = 9.25 &times, 10 3 &nbsp, 1 .

Published
2020
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43. Design, optimization and manufacturing of a miniaturized fluorescence sensing device

Author

Măriuța, Daniel, Baldas, Lucien, Brander, Jürgen, Le Calvé, Stéphane, Colin, Stéphane, Barrot-Lattes, Christine, Magaud, Pascale, Laurien, Nicolas, Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institute of Nanotechnology [Karlsruhe] (INT), Karlsruhe Institute of Technology (KIT), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), In’Air Solutions [Strasbourg, France], H2020, European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), BALDAS, Lucien, Research and training network on MIniaturized Gas flow for Applications with enhanced Thermal Effects - MIGRATE - - H20202015-11-01 - 2019-10-31 - 643095 - VALID, Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi)

Subjects
Computational aided design, residence time distribution, [SPI.MECA.MEFL] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], disposable fluidic cell, computational fluid dynamics, micro-fabrication, low volume liquid detection, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience; This work is part of a larger effort to miniaturize a microfluidic formaldehyde sensing device recently developed and commercialized by InAirSolutions Strasbourg 1. The detector is already an innovation in the field being capable to detect continuously formaldehyde concentrations lower than 1 ppb in stabilized conditions and long range campaigns, fulfilling the new imposed regulations in the field of indoor air pollution [1]. The sensing device works in four steps: i) gas sampling, ii) trapping of formaldehyde from air to a liquid reagent, iii) derivatization reaction with acetylacetone solution at 65°C producing a fluorescent compound (DDL), iv) colorimetric detection employing a commercial fluorescence detection system. Apart of increasing significantly the overall price of the system, the commercial fluorescence systems has a large dead volume decreasing the response time of the measurement process and increasing the necessary liquid flow rate. Starting from this current situation, one of the project goals is to develop a cheap miniaturized fluorescence sensing system. Finally, the aim is to develop an ultra-portable formaldehyde sensing device with larger autonomy and shorter response time compared to the current device, using the state of the art in the field of micro-fabrication, opto-fluidics and gas-liquid trapping/contacting. One of the major challenges in field of lab-on-a-chips is the integration of fluorescence optical sensors in ultra-portable, low maintenance, low power consumption, sensitive, reproducible and cheap platforms for small liquid samples sensing. Since the emergence of this field three decades ago, progress has been registered and different integration strategies of the fluorescence optical components have been tested by different research groups. Starting from the latest achievements to our knowledge in this field [2-5], a simple and relatively low-cost fluorescence sensing platform has been designed, 1 http://www.inairsolutions.fr/

Published
2018

44. Prototyping a miniaturized microfluidic sensor for real-time detection of airborne formaldehyde

Author

Măriuța, Daniel, Baldas, Lucien, Colin, Stéphane, Le Calvé, Stéphane, Korvink, Jan Gerrit, Brandner, Juergen J., Institut Clément Ader (ICA), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Karlsruhe Institute of Technology (KIT), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institute of Microstructure Technology (IMT), European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), Department of Microsystems Engineering [Freiburg] (IMTEK), University of Freiburg [Freiburg], Institute for Micro Process Engineering, Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), and Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Contact sensing, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, [SDE.IE]Environmental Sciences/Environmental Engineering, on-chip membrane-based gas-liquid contacting, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, micro-fabrication, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, time-resolved CMOS sensing, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Formaldehyde is a carcinogenic volatile organic compound that is largely used in the fabrication process of a variety of household products, being sometimes released indoor in concentrations that are beyond the limits recommended by the World Health Organization. The current commerciallyavailable formaldehyde sensors are far from simultaneously being ultra-portable, highly sensitive (< 1 ppb), real-time, and especially cost-efficient. This work aims to study the feasibility to miniaturize the formaldehyde sensing system down to a palm hand device, based on the microfluidic Hantzsch reaction method and fluorescence detection. A Gas-Liquid Micro-Reactor based on integration of a hydrophobic membrane inside a polymer flat chip is proposed and its formaldehyde trapping yield is planned to be further tested. By combining contact sensing with time-resolved CMOS sensors, the dimensions of the fluorescence detection component could go down to 10 mm × 20 mm × 30 mm by using commercialavailablecomponents and therefore, enabling continuous and fast-response measurements using small volumes and low concentration samples.

Published
2020
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45. The influence of gas-wall interactions on the accommodation coefficients for rarefied gases: a molecular dynamics study

Author

Mohammad Nejad, Shahin, Gaastra - Nedea, Silvia, Frijns, Arjan, Brandner, Jürgen, Baldas, Lucien, and Energy Technology

Abstract

The energy accommodation coefficient (EAC) and the momentum accommodation coefficient (MAC) are two significant parameters determining the gas-solid energy and momentum exchange efficiencies. In this work, molecular dynamics (MD) simulations were employed to study the impact of gas-wall interaction potential on energy and momentum accommodation coefficients between Gold and monoatomic gases (Argon and Helium). The MD simulation setup consists of two infinite parallel plates of unequal temperature positioned at certain distance (12 nm and 102 nm for Argon and Helium gases, respectively) apart from each other, and of gas molecules confined between them. A pairwise Lennard-Jones 12-6 potential was considered at the solid-gas interface. The interaction potential parameters were obtained using the Lorentz-Berthelot (LB) and Fender- Halsey (FH) mixing rules, as well as based on existing ab-initio computations. Comparing the obtained results for the accommodation coefficients with empirical values revealed that the interaction potential based on abinitio calculations is the most reliable one for computing ACs. Besides, in the case of Au-Ar, the LB mixing rule substantially overpredicts the potential well depth which leads to sticking gas atoms on the solid surface. As a result, computing accommodation coefficients in this case from numerical point of view was not possible.

Published
2019

46. Measurement of the interfacial temperature jump during steady-state evaporation of a droplet

Author

Betsema, R., Gaastra - Nedea, Silvia, Frijns, Arjan, Brandner, Jürgen, Baldas, Lucien, and Energy Technology

Abstract

Evaporation is an important phenomena that occurs in a wide range of natural and industrial processes. Although this phenomena has been a subject of research for many years, it is still not fully understood. Experimental results of the last few decades seem to contradict with each other, and with the theory which describes this process, e.g. the kinetic theory of gasses (KTG) and non-equilibrium thermodynamics (NET). Temperature jumps of about 3.2-8.1oC at the interface of a steady state evaporating water droplet at a pressure of about 245 Pa were measured . In order to determine whether this temperature jump exists and what influences this temperature jump, an experimental setup has been developed and the results are compared to theory.

Published
2019

47. Comparative study of the evaporation coefficient predicting methods using molecular dynamics simulations

Author

Wolf, Moritz, Frijns, Arjan, Gaastra - Nedea, Silvia, Enright, Ryan, Brandner, Jürgen, Baldas, Lucien, and Energy Technology

Abstract

Kinetic theory and molecular dynamics play an important role in investigating non-equilibrium phenomenon at the liquid-vapor interface where vaporation/condensation take place. A new alternative method to extract the evaporation/condensation coefficients on molecular level is presented as well as an overview of existing coefficient Molecular Dynamics (MD) extraction methods. The alternative method shows the advantage that no additional MD simulations are required to define the evaporation/ condensation coefficient compared to the methods of Gu et al. and Ishiyama et al. The influence of the liquid and vapor boundary position on the evaporation coefficient is investigated. Exploring different combinations of the methods, provides multiple coefficients for each temperature T between the boiling (Tb = 87.3K) and critical (TC = 150.7K) temperature of Argon. For an equilibrium liquid-vapor system of Argon, the results include an average evaporation coefficient 0.9> alpha_e > 0.4 as function of temperature with standard deviation 0.07< SD< 0.04. Comparison between our results and literature data shows that most data falls within the confidence bounds and confirms that, at equilibrium, the coefficients decrease with increasing temperature. Using the half-range Maxwellian assumption for the distribution of the outgoing mass fluxes from the liquid to vapour phase results in higher evaporation coefficients when compared to corresponding values based on molecular computed fluxes. Depending on the vapour boundary position, this results in often unrealistic (alpha_e > 1) evaporation coefficients at low temperatures.

Published
2019

48. Microfluidic sensing of airborne formaldehyde: towards on-chip integration (oral presentation & poster & proceedings with peer review)

Author

Măriuța, Daniel, Baldas, Lucien, Colin, Stéphane, Barrot-Lattes, Christine, Le Calvé, Stéphane, Korvink, Jan Gerrit, Brandner, Juergen J., Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Microsystems Engineering [Freiburg] (IMTEK), University of Freiburg [Freiburg], Institute for Micro Process Engineering, European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Le Calvé, Stéphane, and Research and training network on MIniaturized Gas flow for Applications with enhanced Thermal Effects - MIGRATE - - H20202015-11-01 - 2019-10-31 - 643095 - VALID

Subjects
Contact sensing, [CHIM.ANAL] Chemical Sciences/Analytical chemistry, [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, CMOS-based fluorescence sensing ABSTRACT, Micro-fabrication, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, On-chip membrane-based gas-liquid contacting, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

49. Investigations on acetone vapour photoluminescence for applications in molecular tagging techniques

Author

Yeachana, Varun, Barrot, Christine, Baldas, Lucien, Rojas-Cárdenas, Marcos, Laurien, Nicolas, Colin, Stéphane, Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Karlsruhe Institute of Technology, European Project: 643095,H2020,H2020-MSCA-ITN-2014,MIGRATE(2015), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)

Subjects
Molecular tagging thermometry, phosphorescence, gas microflows, rarefied flows, fluorescence, ComputingMilieux_MISCELLANEOUS, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience

Published
2019

50. SUPERSONIC EJECTOR WITH ANNULAR CHAMBER

Author

Baldas, Lucien, Orieux, Stéphane, Joguet, Loïc, Cecchin, Michel, Milhau, Pierre, Institut Clément Ader (ICA), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO), Institut Supérieur de l'Aéronautique et de l'Espace (ISAE-SUPAERO)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-IMT École nationale supérieure des Mines d'Albi-Carmaux (IMT Mines Albi), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)

Subjects
[SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

Venturi ejector (1) comprising: - a duct (2) for supplying pressurized fluid extending along a central axis (Oy); - a first expansion chamber (3) connected to the supply duct (2); - a first mixing chamber (4) connected to the expansion chamber (3); - a first suction chamber (5) connected to the mixing chamber (4); - an exhaust chamber (6) connected to the first mixing chamber (4); characterized in that the pressurized fluid penetrates the first expansion chamber in a plurality of directions extending along a plane that is substantially orthogonal to the central axis (Oy). Vacuum generator comprising such an ejector.

Published
2019

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