Search

Your search keyword '"Manufacturing Department (MGEP)"' showing total 14 results
Start Over Author "Manufacturing Department (MGEP)" Publication Year Range Last 10 years
14 results on '"Manufacturing Department (MGEP)"'

1. Diffusion in liquid mixtures

Author

A. Vailati, H. Bataller, M. M. Bou-Ali, M. Carpineti, R. Cerbino, F. Croccolo, S. U. Egelhaaf, F. Giavazzi, C. Giraudet, G. Guevara-Carrion, D. Horváth, W. Köhler, A. Mialdun, J. Porter, K. Schwarzenberger, V. Shevtsova, A. De Wit, Università degli Studi di Milano = University of Milan (UNIMI), Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Manufacturing Department (MGEP), Mondragon Unibertsitatea, Faculty of Physics [Vienna], Universität Wien, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Unité de Nutrition Humaine (UNH), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Clermont Auvergne (UCA), Universität Bayreuth, Université libre de Bruxelles (ULB), University of Hawai'i [Honolulu] (UH), Ikerbasque - Basque Foundation for Science, and Wageningen University and Research Centre (WUR)

Subjects
[PHYS]Physics [physics], Physics and Astronomy (miscellaneous), fluctuations, Materials Science (miscellaneous), Medicine (miscellaneous), microgravity, Agricultural and Biological Sciences (miscellaneous), Biochemistry, Genetics and Molecular Biology (miscellaneous), Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin), Settore FIS/03 - Fisica della Materia, Diffusion, mixtures, Space and Planetary Science, space exploration
Abstract

The understanding of transport and mixing in fluids in the presence and in the absence of external fields and reactions represents a challenging topic of strategic relevance for space exploration. Indeed, mixing and transport of components in a fluid are especially important during long-term space missions where fuels, food and other materials, needed for the sustainability of long space travels, must be processed under microgravity conditions. So far, the processes of transport and mixing have been investigated mainly at the macroscopic and microscopic scale. Their investigation at the mesoscopic scale is becoming increasingly important for the understanding of mass transfer in confined systems, such as porous media, biological systems and microfluidic systems. Microgravity conditions will provide the opportunity to analyze the effect of external fields and reactions on optimizing mixing and transport in the absence of the convective flows induced by buoyancy on Earth. This would be of great practical applicative relevance to handle complex fluids under microgravity conditions for the processing of materials in space.

Published
2023
Full Text
View/download PDF

2. Data quality assessment of Diffusion Coefficient Measurements in ternary mIXtures 4 (DCMIX4) experiment

Author

Werner Köhler, Henri Bataller, Ilya I. Ryzhkov, M. Mounir Bou-Ali, Marco Braibanti, Ane Errarte, Viktar Yasnou, Fina Gavaldà, Stephan van Vaerenbergh, Jacobo Rodríguez, Quentin Galand, Valentina Shevtsova, L. García-Fernández, Jose Javier Fernández, Aliaksandr Mialdun, Fabrizio Croccolo, Yuri Gaponenko, Marcel Schraml, José M. Ortiz de Zárate, J.M. Ezquerro, Tatyana Lyubimova, Xavier Ruiz, Université libre de Bruxelles (ULB), Manufacturing Department (MGEP), Mondragon Unibertsitatea, Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), Centre National de la Recherche Scientifique (CNRS)-Université de Pau et des Pays de l'Adour (UPPA)-TOTAL FINA ELF, École Polytechnique de Montréal (EPM), Universität Bayreuth, Institute of Continuous Media Mechanics of the RAS (ICMM), Ural Branch of Russian Academy of Sciences (UB RAS), Chemical Physics, EP - CP165/62, and MRC

Subjects
Materials science, Diffusion, Phase (waves), Aerospace Engineering, Binary number, 02 engineering and technology, Thermodiffusion, 01 natural sciences, Technologie des autres industries, Physico-chimie générale, 0203 mechanical engineering, 0103 physical sciences, Thermal, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Ternary mixtures, 010303 astronomy & astrophysics, 020301 aerospace & aeronautics, International space station, Phase-shifting interferometry, Thermal regulation stability, 3. Good health, Computational physics, Temperature gradient, Interferometry, 13. Climate action, Monochromatic color, Ternary operation
Abstract

Thermodiffusion, which leads to a component separation in a mixture due to the thermal gradient, still does not have an unambiguous microscopic picture. Therefore, experimental studies, especially in convection free environment, are important. As part of the 4th campaign on the DCMIX project, thermodiffusion experiments on three compositions of the toluene-methanol-cyclohexane ternary mixture, on a mixture of fullerene-tetralin-toluene and on a mixture of polystyrene-toluene-cyclohexane have been performed in microgravity conditions on board the International Space Station. A binary mixture of polystyrene-toluene has been filled into the companion cell for the campaign. The Selectable Optical Diagnostics Instrument (SODI), wich is a two-wavelength Mach-Zehnder interferometer for the ternary mixtures, plus a monochromatic Mach-Zehnder interferometer for the binary mixture, has been used in order to obtain the temperature and the concentration fields in the cells. Precisely, it is a 5-steps phase-shifting interferometry technique which is implemented with SODI, producing by means of laser illumination a set of 5 phase-shifted images of π/2 between them as function of the time. A total of 58 runs of various durations and at different mean temperatures have been conducted. Here, we evaluate the contrast of the interferograms, the quality in the phase stepping, the stability of the thermal regulation of the experiments and the level of environmental disturbances on board the space station during the campaign., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2020
Full Text
View/download PDF

3. Tailored flux pinning in superconductor/ferromagnet multilayers with engineered magnetic domain morphology from stripes to skyrmions

Author

Javier E. Villegas, Xavier Palermo, Florian Godel, Alexandre I. Buzdin, Jacobo Santamaria, Sophie Collin, Nicolas Reyren, Anke Sander, Vincent Cros, Salvatore Mesoraca, A. V. Samokhvalov, Karim Bouzehouane, Unité mixte de physique CNRS/Thales (UMPhy CNRS/THALES), Centre National de la Recherche Scientifique (CNRS)-THALES, Institute for Physics of Microstructures of the RAS, Russian Academy of Sciences [Moscow] (RAS), Instituto Universitario de Investigacion de Nanocienca de Aragon, University of Zaragoza - Universidad de Zaragoza [Zaragoza], Manufacturing Department (MGEP), Mondragon Unibertsitatea, Centre de physique moléculaire optique et hertzienne (CPMOH), Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1, THALES [France]-Centre National de la Recherche Scientifique (CNRS), ANR-15-CE24-0008,SUPERTRONICS,Control de courants supraconducteurs via des effets de spin et de champ: fondements pour une électronique non conventionnelle(2015), ANR-17-CE30-0018,Optofluxonics,Manipulation optique de quanta de flux individuels dans les supraconducteurs et applications(2017), ANR-11-IDEX-0003,IPS,Idex Paris-Saclay(2011), European Project: 647100,H2020,ERC-2014-CoG,SUSPINTRONICS(2015), and THALES-Centre National de la Recherche Scientifique (CNRS)

Subjects
Superconductivity, Flux pinning, Materials science, Condensed matter physics, Magnetic domain, Skyrmion, Condensed Matter - Superconductivity, Stacking, General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Vortex, Superconductivity (cond-mat.supr-con), [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con], Ferromagnetism, Condensed Matter::Superconductivity, 0103 physical sciences, Thin film, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Superconductor/Ferromagnet (S/F) hybrid systems show interesting magneto-transport behaviors that result from the transfer of properties between both constituents. For instance, magnetic memory can be transferred from the F into the S through the pinning of superconducting vortices by the ferromagnetic textures. The ability to tailor this type of induced behavior is important to broaden its range of application. Here we show that engineering the F magnetization reversal allows tuning the strength of the vortex pinning (and memory) effects, as well as the field range in which they appear. This is done by using magnetic multilayers in which Co thin films are combined with different heavy metals (Ru, Ir, Pt). By choosing the materials, thicknesses, and stacking order of the layers, we can design the characteristic domain size and morphology, from out-of-plane magnetized stripe domains to much smaller magnetic skyrmions. These changes strongly affect the magneto-transport properties. The underlying mechanisms are identified by comparing the experimental results to a magnetic pinning model. * javier.villegas@cnrs-thales.fr 2

Published
2020
Full Text
View/download PDF

4. European Space Agency experiments on thermodiffusion of fluid mixtures in space

Author

Bernard Rousseau, Jean Claude Legros, Josefina Gavaldà, E. Kufner, Quentin Galand, Philipp Baaske, J. M. Ortiz de Zárate, Viktar Yasnou, Aleksandar Donev, Joseph Diaz, Werner Köhler, Henri Bataller, M. Mounir Bou-Ali, Fabrizio Croccolo, Marco Braibanti, Ana Laverón-Simavilla, Fabio Giavazzi, Marina Carpineti, Thomas Triller, Velisa Vesovic, S. Van Vaerenbergh, Stefano Mazzoni, L. García-Fernández, K. Zhang, Hai Hoang, Daniel Zapf, Estela Lapeira, Christopher J. Takacs, Pierre-Arnaud Artola, F. J. Molster, Yuri Gaponenko, Marcel Schraml, Olivier Minster, Alberto Vailati, Shenghua Xu, X. Ruiz, Antonio Verga, A. Mialdun, Tatyana Lyubimova, Guillaume Galliero, Ilya I. Ryzhkov, Roberto Cerbino, A. Frutos-Pastor, J.M. Ezquerro, Ane Errarte, Jean-Patrick Bazile, François Montel, Jacobo Rodríguez, Ion Lizarraga, Cédric Giraudet, Romain Vermorel, N. Melville, Valentina Shevtsova, David S. Cannell, Marzio Giglio, Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), Centre National de la Recherche Scientifique (CNRS)-Université de Pau et des Pays de l'Adour (UPPA)-TOTAL FINA ELF, Manufacturing Department (MGEP), Mondragon Unibertsitatea, Instituto de Fisica Corpuscular (IFIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Universitat de València (UV), Deutsches Elektronen-Synchrotron [Zeuthen] (DESY), Helmholtz-Gemeinschaft = Helmholtz Association, TOTAL-Scientific and Technical Center Jean Féger (CSTJF), TOTAL FINA ELF, Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), Microgravity Research Center, Université libre de Bruxelles (ULB), China Jiliang University (CJLU), department of polymer science and engineering, and Inha University

Subjects
Convection, Materials science, Mass flow, Biotechnologie, Biophysics, Context (language use), Biophysique, Space (mathematics), 01 natural sciences, Thermophoresis, 010305 fluids & plasmas, Aeronáutica, Thermal Non-Equilibrium Phenomena in Soft Matter [Topical issue], 0103 physical sciences, Chimie, Physique des surfaces, General Materials Science, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Complex fluid, Surfaces and Interfaces, General Chemistry, Mechanics, Métallurgie et mines, 13. Climate action, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Ternary operation, Biotechnology
Abstract

This paper describes the European Space Agency (ESA) experiments devoted to study thermodiffusion of fluid mixtures in microgravity environment, where sedimentation and convection do not affect the mass flow induced by the Soret effect. First, the experiments performed on binary mixtures in the IVIDIL and GRADFLEX experiments are described. Then, further experiments on ternary mixtures and complex fluids performed in DCMIX and planned to be performed in the context of the NEUF-DIX project are presented. Finally, multi-component mixtures studied in the SCCO project are detailed. Graphical abstract: [Figure not available: see fulltext.]., 0, SCOPUS: re.j, info:eu-repo/semantics/published

Published
2019
Full Text
View/download PDF

5. Thermodiffusion in Ternary Mixtures of Water/Ethanol/Triethylene Glycol: First Report on the DCMIX3-Experiments Performed on the International Space Station

Author

Ana Laverón-Simavilla, Henri Bataller, Werner Köhler, Marco Braibanti, Fabrizio Croccolo, M. Mounir Bou-Ali, Jacobo Rodríguez, A. Mialdun, S. Van Vaerenbergh, J. M. Ortiz de Zárate, Quentin Galand, Xavier Ruiz, J.M. Ezquerro, Estela Lapeira, Jna. Gavaldà, Tatyana Lyubimova, Ilya I. Ryzhkov, Valentina Shevtsova, Thomas Triller, Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Manufacturing Department (MGEP), Mondragon Unibertsitatea, EAU (EAU), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Deutsches Elektronen-Synchrotron [Zeuthen] (DESY), Helmholtz-Gemeinschaft = Helmholtz Association, Processat Digital de Senyals en Entorns Aeroespacials i Biomèdics, Química Física i Inorgànica, and Universitat Rovira i Virgili

Subjects
Nuclear engineering, General Physics and Astronomy, 01 natural sciences, Thermophoresis, 010305 fluids & plasmas, Set (abstract data type), chemistry.chemical_compound, 0103 physical sciences, International Space Station, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Triethylene glycol, [PHYS]Physics [physics], Applied Mathematics, Physics, General Engineering, Física, Difusió (Física), Interferometry, Difusió (Física)--Experiments, Glovebox, chemistry, Modeling and Simulation, Data quality, 0938-0108, Environmental science, Ternary operation
Abstract

We report on thermodiffusion experiments conducted on the International Space Station ISS during fall 2016. These experiments are part of the DCMIX (Diffusion and thermodiffusion Coefficients Measurements in ternary Mixtures) project, which aims at establishing a reliable data base of non-isothermal transport coefficients for selected ternary liquid mixtures. The third campaign, DCMIX3, focuses on aqueous systems with water/ethanol/triethylene glycol as an example, where sign changes of the Soret coefficient have already been reported for certain binary subsystems. Investigations have been carried out with the SODI (Selectable Optical Diagnostics Instrument) instrument, a Mach-Zehnder interferometer set up inside the Microgravity Science Glovebox in the Destiny Module of the ISS. Concentration changes within the liquids have been monitored in response to an external temperature gradient using phase-stepping interferometry. The complete data set has been made available in spring 2017. Due to additionally available measurement time, it was possible to collect a complete data set at 30∘C and an almost complete data set at 25∘C, which significantly exceeds the originally envisaged measurements at a single temperature only. All samples could be measured successfully. The SODI instrument and the DCMIX experiments have proven reliable and robust, allowing to extract meaningful data even in case of unforeseen laser instabilities. First assessments of the data quality have revealed six out of 31 runs with some problems in image contrast and/or phase step stability that will require more sophisticated algorithms. This publication documents all relevant parameters of the conducted experiments and also events that might have an influence on the final results. The compiled information is intended to serve as a starting point for all following data evaluations.

Published
2018
Full Text
View/download PDF

6. Thermodiffusion coefficients measurements of the n-pentane, n-heptane and n-decane ternary mixture

Author

Bataller, Henri, Lizarraga, I., Pigot, T., Croccolo, Fabrizio, Bou-Ali, M., Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Physics Department, Albert-Ludwigs-Universität Freiburg, Manufacturing Department (MGEP), and Mondragon Unibertsitatea

Subjects
[PHYS]Physics [physics], [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph], ComputingMilieux_MISCELLANEOUS, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

COM; International audience

Published
2017

7. Modified magnetic anisotropy at LaCoO 3 /La 0.7 Sr 0.3 MnO 3 interfaces

Author

Cabero, M., Nagy, K., Gallego, F., Sander, A., Rio, M., Cuellar, F. A., Tornos, J., Hernandez-Martin, D., Nemes, N. M., Mompean, F., Garcia-Hernandez, M., Rivera-Calzada, A., Sefrioui, Z., Reyren, N., Feher, T., Varela, M., Christelle Leon, Santamaria, J., Reyren, Nicolas, Unité mixte de physique CNRS/Thales (UMPhy CNRS/THALES), Centre National de la Recherche Scientifique (CNRS)-THALES, Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Condensed Matter Physics Group of the Hungarian Academy of Science and Department of Physics, Budapest University of Technology and Economics [Budapest] (BME), Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, Hôpital d'Instruction des Armées du Val de Grâce, Service de Santé des Armées, Manufacturing Department (MGEP), and Mondragon Unibertsitatea

Subjects
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], ComputingMilieux_MISCELLANEOUS, [PHYS.COND] Physics [physics]/Condensed Matter [cond-mat]
Abstract

International audience

Published
2017

8. Determination of thermophysical properties of the iso-massic decane-pentane (nC10-nC5) binary mixture at high pressure

Author

Lizarraga, I., Bataller, Henri, Croccolo, Fabrizio, Bou-Ali, M., Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Manufacturing Department (MGEP), and Mondragon Unibertsitatea

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph], [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

AFF; International audience

Published
2016

9. Mass diffusion (D) and thermal diffusivity (kT) coefficients measurements under high pressure on iso-massic binary mixture of decane (C10) and pentane (C5)

Author

Bataller, Henri, Lizarraga, I., Bou-Ali, M., Croccolo, Fabrizio, Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Manufacturing Department (MGEP), Mondragon Unibertsitatea, Physics Department, and Albert-Ludwigs-Universität Freiburg

Subjects
[PHYS]Physics [physics], [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph], [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

AFF; International audience

Published
2016

10. Determination of the Soret coefficient of the iso-massic binary mixture of dodecane-hexane (nC12-nC6) under high pressure

Author

Lizarraga, I., Bataller, Henri, Croccolo, Fabrizio, Bou-Ali, M., Laboratoire des Fluides Complexes et leurs Réservoirs (LFCR), TOTAL FINA ELF-Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Manufacturing Department (MGEP), and Mondragon Unibertsitatea

Subjects
[PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph], [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], [PHYS.MECA.GEME]Physics [physics]/Mechanics [physics]/Mechanical engineering [physics.class-ph], ComputingMilieux_MISCELLANEOUS, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

COM; International audience

Published
2016

11. Cross diffusion governs an oscillatory instability in a ternary mixture with the Soret effect.

Author

Seta B, Errarte A, Mialdun A, Ryzhkov II, Bou-Ali MM, and Shevtsova V

Abstract

In a ternary mixture with the Soret effect, the interplay between cross-diffusion, thermodiffusion, and convection can lead to rich and complex dynamics including spatial patterns and oscillations. We present an experimental and three-dimensional numerical study of dynamic regimes in the toluene-methanol-cyclohexane ternary mixture with the Soret effect in the geometry of a thermogravitational column. An important feature of the system is that for the first component, toluene, the Soret and thermodiffusion coefficients have opposite signs, which triggers the oscillatory instability. Our experiments and numerical analysis show that the primary long-wave instability manifests itself in the form of a standing wave, and the secondary one emerges in the form of a swinging pattern. The computational model provides insight into the role of cross-diffusion coefficient D 12 in the emergence and development of oscillatory instability. This study demonstrates that the long-wave oscillatory instability in transverse direction occurs only within a limited range of the D 12 values and outside of this range it decays to a stationary pattern of either Turing-like or monotonic instability.

Published
2023
Full Text
View/download PDF

12. The Soret effect in ternary mixtures of water+ethanol+triethylene glycol of equal mass fractions: Ground and microgravity experiments.

Author

Triller T, Sommermann D, Schraml M, Sommer F, Lapeira E, Bou-Ali MM, and Köhler W

Abstract

Measurements of the Soret and thermodiffusion coefficients of a symmetric ternary mixture with equal mass fractions of water, ethanol, and triethylene glycol have been performed by two-color optical beam deflection (2-OBD) and the thermogravitational column technique (TGC) in the laboratory and under microgravity conditions in the Selectable Optical Diagnostics Instrument (SODI) aboard the International Space Station. The results from all three experimental techniques agree within the experimental error bars, which result mainly from the inversion of the contrast factor matrices. TGC shows by far the lowest, 2-OBD the highest error amplification. The microgravity measurements are in between. The agreement with the microgravity results shows that thermosolutal convection could be well controlled in the 2-OBD experiments by a proper orientation of the temperature gradient. Despite the different condition numbers, the results are invariant under the choice of the independent compositions. Based on the orientation of the confidence ellipsoid in the ternary composition diagram, not all coefficients are equally affected by experimental errors. Although there are appreciable uncertainties for water and ethanol, the Soret and the thermodiffusion coefficients of triethylene glycol could be obtained with a good accuracy due to the favorable orientation of the confidence ellipsoid. We have found that water behaves thermophobic, corresponding to a positive Soret coefficient, whereas both ethanol and triethylene glycol are thermophilic with negative Soret coefficients. This resembles the behaviour of the binary system ethanol/water above the ethanol concentration of the sign change.

Published
2019
Full Text
View/download PDF

13. Contribution to the benchmark for ternary mixtures: Determination of Soret coefficients by the thermogravitational and the sliding symmetric tubes techniques.

Author

Larrañaga M, Bou-Ali MM, de Mezquıa DA, Rees DA, Madariaga JA, Santamaría C, and Platten JK

Abstract

This work is part of an international project for the research on the transport properties in ternary mixtures. Six different teams have analysed the same mixture by independent techniques in order to compare the results and validate the techniques. This work is the contribution of the team of Mondragon Unibertsitatea for ground conditions measurements. This team has measured the thermodiffusion coefficients by the thermogravitational techniques and the molecular diffusion coefficients by the Sliding Symmetric Tubes technique. The Soret coefficients have been determined by the combination of the thermodiffusion and molecular diffusion coefficients. The mixture chosen for the study is the one formed by 1,2,3,4-tetrahydronaphtalene, isobutylbenzene and n-dodecane at mass fraction of 80% of THN, 10% of IBB and 10% of n C12, and at 25°C. The good agreement between the results of the different teams shows the validity of the techniques used in this work.

Published
2015
Full Text
View/download PDF

14. Benchmark values for the Soret, thermodiffusion and molecular diffusion coefficients of the ternary mixture tetralin+isobutylbenzene+n-dodecane with 0.8-0.1-0.1 mass fraction.

Author

Bou-Ali MM, Ahadi A, Alonso de Mezquia D, Galand Q, Gebhardt M, Khlybov O, Köhler W, Larrañaga M, Legros JC, Lyubimova T, Mialdun A, Ryzhkov I, Saghir MZ, Shevtsova V, and Van Vaerenbergh S

Abstract

With the aim of providing reliable benchmark values, we have measured the Soret, thermodiffusion and molecular diffusion coefficients for the ternary mixture formed by 1,2,3,4-tetrahydronaphthalene, isobutylbenzene and n-dodecane for a mass fraction of 0.8-0.1-0.1 and at a temperature of 25°C. The experimental techniques used by the six participating laboratories are Optical Digital Interferometry, Taylor Dispersion technique, Open Ended Capillary, Optical Beam Deflection, Thermogravitational technique and Sliding Symmetric Tubes technique in ground conditions and Selectable Optical Diagnostic Instrument (SODI) in microgravity conditions. The measurements obtained in the SODI installation have been analyzed independently by four laboratories. Benchmark values are proposed for the thermodiffusion and Soret coefficients and for the eigenvalues of the diffusion matrix in ground conditions, and for Soret coefficients in microgravity conditions.

Published
2015
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results