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12 results on '"Department of mechanical and industrial engineering (Toronto, CANADA)"'

1. About the influence of temperature and environmental relative humidity on the longitudinal and transverse mechanical properties of elementary alfa fibers

Author

Habiba Bougherara, Mokhtar Khaldi, Alexandre Vivet, Mohamed Mokhtar Bouziane, University of Mustapha Stambouli Mascara, École Nationale Polytechnique d'Oran Maurice Audin (ENPO-MA), Propriétés des Matériaux pour les Economies d'Energie (PM2E), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], University Mustapha Stambouli [Mascara], Laboratoire de Biochimie analytique et Biotechnologies [Tizi-Ouzou] (LABAB), Université Mouloud Mammeri [Tizi Ouzou] (UMMTO), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Materials science, Polymers and Plastics, hydrophilic polymers, Modulus, 02 engineering and technology, fibers, mechanical properties, 010402 general chemistry, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Ultimate tensile strength, Materials Chemistry, Relative humidity, Composite material, cellulose and other wood products, Thermal cycle, Humidity, General Chemistry, Nanoindentation, 021001 nanoscience & nanotechnology, Durability, 0104 chemical sciences, Surfaces, Coatings and Films, Transverse plane, biodegradable, 0210 nano-technology
Abstract

Composites reinforced with plant-based fibers present a high potential for valori- zation in new industrial applications due to their good specific mechanical charac- teristics, renewability, and recyclability. In order to accelerate their wide industry adoption, it is critical to assess their behavior and durability in heat and humid environments. This article aims at investigating the effects of temperature and rel- ative humidity (RH) on the longitudinal and transverse mechanical properties of the lignocellulosic fibers extracted from alfa plant (Stipa tenacissima L). For this purpose, tensile and nanoindentation tests were performed on elementary alfa fibers subjected to a thermal cycle of 200  C. The fibers were held at various periods of 15, 30, 60 and 120 min. The test results showed that the longitudinal and transverse Young's moduli are moderately affected by short thermal cycles having duration of 15–30 min. However, for longer thermal cycle (i.e., 2 hr), a deg- radation of 21% for the transverse modulus was recorded. This degradation dou- bled for the longitudinal modulus (43 vs. 21%). A similar trend was observed for the breaking strength. This study also showed that the RH strongly affects the mechanical performances of alfa fibers.

Published
2020
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2. Mesoscale modelling of tensile response and damage evolution in natural fibre reinforced laminates

Author

Fodil Meraghni, Habiba Bougherara, Yves Chemisky, Zia Mahboob, Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux (LEM3), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), and This research is supported in part by Natural Sciences and Engineering Research Council of Canada e Discovery Grants program(NSERC-DG), funding reference RGPIN 2014-05838.

Subjects
Materials science, Mesoscale meteorology, 02 engineering and technology, [SPI.MECA.SOLID]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Solid mechanics [physics.class-ph], 010402 general chemistry, 01 natural sciences, Industrial and Manufacturing Engineering, Damage mechanics, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Optimisation algorithm, Mécanique: Mécanique des matériaux [Sciences de l'ingénieur], Tensile response, Composite material, Plastic deformation, Engineering structures, business.industry, Mechanical Engineering, Mécanique: Mécanique des solides [Sciences de l'ingénieur], Mechanical testing, Epoxy, Structural engineering, 021001 nanoscience & nanotechnology, Natural fibre composites, 0104 chemical sciences, Nonlinear system, Continuum damage mechanics, Computational modelling, Mechanics of Materials, visual_art, Ceramics and Composites, visual_art.visual_art_medium, 0210 nano-technology, business
Abstract

A continuum damage mechanics based mesoscale model is developed within a thermodynamics framework to describe the in-plane tensile response in natural fibre composites. The standard Mesoscale Damage Theory (MDT) is modified to incorporate damage and inelasticity evolution in the fibre-direction, thereby capturing the unique nonlinear fibre-direction response evidenced in natural fibre composites (NFC). The multi-ply damage model is validated using tests on Flax/epoxy laminates and available data on Carbon/epoxy laminates. Model parameters are identified for Flax/epoxy by applying an optimisation algorithm that compares numerical predictions with experimental data. Predictions of mechanical response, stiffness degradation, and inelasticity correlate very well with experimental observations of Flax-laminates. This modified-MDT model offers a predictive, robust tool to aid the development of NFC engineering structures. This research is supported in part by Natural Sciences and Engineering Research Council of Canada e Discovery Grants program (NSERC-DG), funding reference RGPIN 2014-05838.

Published
2017
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3. Effect of Nitrogen on Properties of Na 2 O-CaO-SrO-ZnO-SiO 2 Glasses

Author

Mark R. Towler, Claudine Follet, Anne Leriche, Arnaud Tricoteaux, Cyrille Mercier, Stuart Hampshire, Jean-Christophe Hornez, Ahmed Bachar, Bertrand Revel, Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 (LMCPA), Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre Commun de Mesure de RMN, Université de Lille, Sciences et Technologies, Materials and Surface Sciences Institute, University of Limerick (UL), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], and Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO)

Subjects
chemistry.chemical_classification, Materials science, Silicon, Base (chemistry), Doping, Oxide, chemistry.chemical_element, Mineralogy, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Nitrogen, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Chemical engineering, Reagent, Indentation, Materials Chemistry, Ceramics and Composites, 0210 nano-technology, Elastic modulus
Abstract

International audience; Glasses in the Na2O–CaO–SrO–ZnO–SiO2 system have previously been investigated for suitability as a reagent in Al-free glass polyalkenoate cements (GPCs). These materials have many properties that offer potential in orthopedics. However, their applicability has been limited, to date, because of their poor strength. This study was undertaken with the aim ofincreasing the mechanical properties of a series of these Zn-based GPC glasses by doping with nitrogen to give overall compositions of: 10Na2O–10CaO–20SrO–20ZnO–(40 – 3x) SiO2–xSi3N4 (x is the no. of moles of Si3N4). The density, glass-transition temperature, hardness, and elastic modulus of each glass were found to increase fairly linearly with nitrogencontent. Indentation fracture resistance also increases with nitrogen content according to a power law relationship. Theseincreases are consistent with the incorporation of N into the glass structure in threefold coordination with silicon resulting in extra cross-linking of the glass network. This was confirmed using 29Si MAS-NMR which showed that an increasing numberof Q2 units and some Q3 units with extra bridging anions are formed as nitrogen content increases at the expense of Q1units. A small proportion of Zn ions are found to be in tetrahedral coordination in the base oxide glass and the proportion of these increases with the presence of nitrogen.

Published
2015
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4. Processing and electrical characterization of a unidirectional CFRP composite filled with double walled carbon nanotubes

Author

Ihab El Sawi, Philippe Demont, Philippe Olivier, Habiba Bougherara, 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 ) -Institut National des Sciences Appliquées ( INSA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ) -IMT École nationale supérieure des Mines d'Albi-Carmaux ( IMT Mines Albi ), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University (Toronto), Centre interuniversitaire de recherche et d'ingenierie des matériaux ( CIRIMAT ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), 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), Ryerson University [Toronto], Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), 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 Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Ryerson University (CANADA), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
Polymer-matrix composites (PMCs), Materials science, Carbon nanotube actuators, Matériaux, Composite number, Carbon nanotubes, Mechanical properties of carbon nanotubes, 02 engineering and technology, Carbon nanotube, Conductivity, 010402 general chemistry, 01 natural sciences, law.invention, Electrical resistivity and conductivity, law, Tunneling conduction, Composite material, Carbon fiber reinforced polymer, General Engineering, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Thermal conduction, 0104 chemical sciences, [ CHIM.MATE ] Chemical Sciences/Material chemistry, Ceramics and Composites, Electrical properties, 0210 nano-technology
Abstract

International audience; Carbon nanotubes represent new emergent multifunctional materials that have potential applications for structural and electrically conductive composites. In the current paper we present a suitable technique for the integration of Double Walled Carbon Nanotubes (DWCNTs) in a unidirectional Carbon Fiber Reinforced Polymer (CFRP) with high volume content of carbon fiber. We showed that the electrical conductivity of the laminates versus temperature follows a non-linear variation which can be well described by the Fluctuation-Induced Tunneling Conduction (FITC) model. The parameters of this model for CFRP/ DWCNTs and CFRP without DWCNTs were determined using best fit curves of the experimental data. This study has shown that DWCNTs have strong influence in the conductivity through laminate thickness. However, there are no significant effects on the electrical conductivity measured in the other two principle directions of the composite laminate. Furthermore, it was found that electron conduction mechanism of carbon fibers is dominated by the FITC.

Published
2012
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5. Investigation of the effect of double-walled carbon nanotubes on the curing reaction kinetics and shear flow of an epoxy resin

Author

Philippe Demont, Ihab El Sawi, Habiba Bougherara, Philippe Olivier, Institut Clément Ader ( ICA ), IMT École nationale supérieure des Mines d'Albi-Carmaux ( IMT Mines Albi ) -Institut Supérieur de l'Aéronautique et de l'Espace ( ISAE-SUPAERO ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -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 ), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University (Toronto), Centre interuniversitaire de recherche et d'ingenierie des matériaux ( CIRIMAT ), Institut National Polytechnique [Toulouse] ( INP ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE), Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), University of Toronto (CANADA), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), 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), Ryerson University [Toronto], Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), 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 Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)

Subjects
Materials science, Polymers and Plastics, Matériaux, [ SPI.MAT ] Engineering Sciences [physics]/Materials, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], Reaction rate, Differential scanning calorimetry, Rheology, Cure kinetics, law, Carbon nanotubes/epoxy, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Shear viscosity, Materials Chemistry, Composite material, Curing (chemistry), General Chemistry, Epoxy, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Shear rate, visual_art, [ PHYS.MECA.MEMA ] Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [ SPI.MECA.MEMA ] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], visual_art.visual_art_medium, Mécanique des matériaux, 0210 nano-technology, Glass transition
Abstract

International audience; In this article, the effect of combined temperature- concentration and shear rate conditions on the rheology of double-walled carbon nanotubes (DWCNTs)/ RTM6-Epoxy suspension was investigated to determine the optimum processing conditions. The rheological behavior and cure kinetics of this nanocomposite are presented. Cure kinetics analysis of the epoxy resin and the epoxy resin filled with DWCNTs was performed using Differential Scanning Calorimeter (DSC) and parameters of the kinetics model were compared. The DWCNTs have an acceleration effect on the reaction rate of the epoxy resin but no significant effect is noted on the glass transition temperature of the epoxy resin. This study reveals that the effect of shear-thinning is more pronounced at high temperatures when DWCNTs content is increased. In addition, the steady shear flow exhibits a thermally activated property above 60°C whereas the polymer fluid viscosity is influenced by the free volume and cooperative effects when the temperature is below 60°C.

Published
2012
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6. Thermodiffusion: From microgravity experiments to the initial state of petroleum reservoirs

Author

François Montel, Guillaume Galliero, Veronique Lazzeri, M. Ziad Saghir, Mathieu Touzet, Jean Claude Legros, 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, Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], Centre scientifique et Technique Jean Feger (CSTJF), TOTAL FINA ELF, MRC, ULB, and Université libre de Bruxelles (ULB)

Subjects
Materials science, Dodecane, Strategy and Management, Thermodynamics, 02 engineering and technology, 01 natural sciences, Thermophoresis, Methane, 010305 fluids & plasmas, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Molecular dynamics, chemistry.chemical_compound, 0103 physical sciences, Media Technology, General Materials Science, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph], Marketing, Butane, 021001 nanoscience & nanotechnology, Petroleum reservoir, chemistry, 13. Climate action, Petroleum, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], 0210 nano-technology, Ternary operation
Abstract

International audience; Microgravity experiments and molecular dynamics simulations have been performed to study thermodiffusion of ternary mixtures composed of methane, n-butane and n-dodecane in petroleum reservoirs conditions. The simulations showed in both cases that methane and n-butane tend to migrate towards the hot side while n-dodecane tends to migrate towards the cold side. Some of the experimental results showed the same trend but with much larger amplitudes. Finally, a simulation of an idealized fluid column composed of one of the ternary mixture emphasizes that thermodiffusion can have a large impact on the vertical distribution of the components in a petroleum reservoir.

Published
2011
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7. Elaboration des matériaux composites : procédés et simulations associées

Author

Olivier , Philippe, Paris , Christophe, Boyer , François, El Sawi , Ihab, Bernhart , Gérard, 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), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], 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 ) -Institut National des Sciences Appliquées ( INSA ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ) -IMT École nationale supérieure des Mines d'Albi-Carmaux ( IMT Mines Albi ), Ryerson University (Toronto), 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]Engineering Sciences [physics], [ SPI ] Engineering Sciences [physics], ComputingMilieux_MISCELLANEOUS
Abstract

National audience

Published
2011

8. Experimental microgravity Soret Coefficients in multicomponent systems: towards mixing rules?

Author

Van Vaerenbergh, Stephan, Saghir, Z.M., Daridon, Jean-Luc, Luhmer, Michel, Galand, Quentin, Galliero, Guillaume, Montel, François, Bickert, Jacques, Legros, Jean-Claude, MRC, Université libre de Bruxelles (ULB), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], Thermodynamique et Energétique des fluides complexes (TEFC), Université de Pau et des Pays de l'Adour (UPPA)-TOTAL SA-Centre National de la Recherche Scientifique (CNRS), Centre scientifique et Technique Jean Feger (CSTJF), and TOTAL FINA ELF

Subjects
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
Abstract

International audience; Soret effect in multicomponent system (more than 2 components) are being studied starting from binary solutions. Possible predictive theories are extensions of the thermodynamic theories, molecular dynamics, but also by the mechanical statistics extensions. The latter are illustrated at the light of the experiments obtained in microgravity conditions. For binary melts, a very good concordance between measurements on samples processed in microgravity and the statistical theory is obtained under the form of thermodiffusion factors as function of mass misfit. The same approach is used for hydrocarbon ternary and quaternary solution processed in microgravity in the SCCO experiment.

Published
2010

9. Estimation of thermal diffusion coefficients for hydrocarbon mixtures using molecular dynamics and the irreversible thermodynamic theory

Author

Galliero, Guillaume, Yan, Y., Saghir, Z.M., Thermodynamique et Energétique des fluides complexes (TEFC), Université de Pau et des Pays de l'Adour (UPPA)-TOTAL SA-Centre National de la Recherche Scientifique (CNRS), Transferts, écoulements, fluides, énergétique (TREFLE), Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etudes des Transferts d'Energie et de Matière (LETEM), Université Paris-Est Marne-la-Vallée (UPEM), Department of mechanical and industrial engineering (Toronto, CANADA), and Ryerson University [Toronto]

Subjects
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2008

10. Simulation of Ludwig–Soret effect of a water–ethanol mixture in a cavity filled with aluminum oxide powder under high pressure

Author

Henri Bataller, C.G. Jiang, T. J. Jaber, M. Z. Saghir, Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], Thermodynamique et Energétique des fluides complexes (TEFC), and Université de Pau et des Pays de l'Adour (UPPA)-TOTAL SA-Centre National de la Recherche Scientifique (CNRS)

Subjects
Convection, Materials science, General Engineering, Porous media, Thermodynamics, 02 engineering and technology, Soret effect, Condensed Matter Physics, Mole fraction, Thermal diffusivity, 01 natural sciences, Thermophoresis, 010305 fluids & plasmas, Separation, 020303 mechanical engineering & transports, Thermal conductivity, 0203 mechanical engineering, 0103 physical sciences, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Porous medium, Porosity, Mass fraction
Abstract

Thermosolutal convection of a water–ethanol binary mixture, with a 50% mass fraction, at a high pressure of 750 bar, in a three-dimensional horizontal cavity, filled with an aluminum oxide (Al2O3) porous medium, is numerically investigated. Such investigation is examined in terms of the compositional separation versus the thermal conductivity and permeability of Al2O3 porous medium. The thermal diffusion, or Soret effect, is analyzed globally with a separation ratio and locally with the distributions of ethanol mole fraction on the horizontal and vertical lines in the center of the porous cavity. The Soret coefficient of ethanol at 30 °C was found to vary between −0.00699 and −0.00610 when pressure increases from 1 to 750 bar, leading to a ± 13.74 % relative variation around the mean value. On the other hand, the Soret coefficient of ethanol at 750 bar will vary from −0.00697 to −0.00534 when the temperature increases from 10 to 50 °C, leading to ± 26.48 % relative variation around the mean value. The details of the compositional separation at the steady state of thermosolutal convection are also applied to study the characteristics of Soret effect. When the value of permeability is less than 104 md, the compositional separation in the cavity is evident. However, when the value of permeability is larger than 104 md, the thermosolutal convection creates a mixing of the substances and the separation is diminished. Recommendations are made for the experimental design based on the results of numerical analysis.

Published
2008
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11. Development of a new high pressure thermodiffusion cell

Author

Henri Battaler, Christelle Miqueu, Frédéric Plantier, Jean-Luc Daridon, Saghir, Z. M., Dubois, F., Stephan van Vaerenbergh, Thermodynamique et Energétique des fluides complexes (TEFC), Université de Pau et des Pays de l'Adour (UPPA)-TOTAL SA-Centre National de la Recherche Scientifique (CNRS), Department of mechanical and industrial engineering (Toronto, CANADA), Ryerson University [Toronto], MRC, and Université libre de Bruxelles (ULB)

Subjects
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

12. In what ways does user experience design improve printed educational materials?

Author

Kealey MR, Urakami J, Henderson K, Chignell M, and Straus SE

Subjects
Female, Humans, Early Detection of Cancer, Publications, Educational Status, Uterine Cervical Neoplasms, Breast Neoplasms
Abstract

We report on a series of four studies that investigated how user experience design (UXD) can improve printed educational materials (PEMs). We examined the perceived usability of an existing PEM for breast cancer screening and observed the usability problems associated with it (Study 1). We then compared a breast cancer screening PEM created by user experience designers with two other breast cancer screening PEMS, finding that the PEM based on UXD had higher perceived usability, and lower mentions of usability problems, than the other two PEMs (Study 2). We next examined the impact of individual differences in design expertise on perceived usability, this time including a PEM on cervical cancer screening as well as one on breast cancer screening (Study 3). Our concluding study (Study 4) then examined the impacts of UXD on learnability of PEM content as defined by answers to a knowledge questionnaire about screening administered before and after reading the PEM, and by intention to screen for cancer after reading the PEM. The first three studies showed that the involvement of UXD improved the perceived usability of PEMs, and Study 3 showed that designers differ in their ability to create useable PEMs. Study 4 failed to find a corresponding improvement in learnability or intention to screen when UXD was used to improve perceived usability. We conclude that a user experience design approach that incorporates graphic design can improve the perceived usability of PEMs in some situations (e.g., when the PEM material is not too lengthy or complex, and when the graphic designer is sufficiently skilled). However, we found no evidence that lack of perceived usability accounted for the failure of PEMS (found in previous research) to improve knowledge or intention to screen., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)

Published
2023
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