A5005627983- Fluid Dynamics and Turbulent Flows
- Nanofluid Flow and Heat Transfer
- Fluid Dynamics and Thin Films
- Welding Techniques and Residual Stresses
- Granular flow and fluidized beds
- Nanomaterials and Printing Technologies
- Computational Fluid Dynamics and Aerodynamics
- Advanced Numerical Methods in Computational Mathematics
- Lattice Boltzmann Simulation Studies
- Nuclear Engineering Thermal-Hydraulics
- Heat Transfer Mechanisms
- Landslides and related hazards
- Solidification and crystal growth phenomena
- Innovative Microfluidic and Catalytic Techniques Innovation
- Heat Transfer and Optimization
- Hydrology and Sediment Transport Processes
- Particle Dynamics in Fluid Flows
- Rheology and Fluid Dynamics Studies
- Additive Manufacturing Materials and Processes
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics Simulations and Interactions
- Heat and Mass Transfer in Porous Media
- Fluid Dynamics and Heat Transfer
- Advanced Welding Techniques Analysis
- Voice and Speech Disorders
Château Gombert
2013-2024
Aix-Marseille Université
2012-2024
Institut Universitaire des Systèmes Thermiques Industriels
2015-2024
Centre National de la Recherche Scientifique
2014-2024
Hôpital de la Timone
2019
Yale University
2017
Institut Universitaire de France
2017
École Polytechnique
2003-2016
Ecolab (France)
2001
We present reproducible experimental measurements for the onset of grain motion in laminar flow and find a constant critical Shields number particle erosion, i.e., θc=0.12±0.03, over large range small Reynolds number: 1.5×10−5⩽Rep⩽0.76. Comparison with previous studies found literature is provided.
Abstract The mobile layer of a granular bed composed spherical particles is experimentally investigated in laminar rectangular channel flow. Both particle and fluid velocity profiles are obtained using image velocimetry for different index-matched combinations wide range flow rates above incipient motion. A full three-dimensional investigation the field inside also provided. These experimental observations compared to predictions two-phase continuum model having frictional rheology describe...
Droplets are ubiquitous and have been studied for a century; however, their internal flow pattern related instabilities that occur in the course of evaporation not fully understood yet. In this paper, we report our investigation results on an ethanol drop evaporating onto heated substrate under weightlessness conditions with pinned contact line. They obtained from both experiments 3D unsteady computations order to determine what kind develop. Our one-sided model demonstrates quantitative...
The work is focused on obtaining boundary conditions for a one-sided numerical model of thermoconvective instabilities in evaporating pinned sessile droplets ethanol heated substrates. In the model, appropriate heat and mass transfer equations are required at droplet surface. Such obtained present based derived semiempirical theoretical formula total droplet's evaporation rate, two-parametric nonisothermal approximation local flux. main purpose these to be applied future three-dimensional...
Abstract The evaporation of sessile drops various volatile and non-volatile liquids, their internal flow patterns with or without instabilities have been the subject many investigations. current experiment is a preparatory one for space planned to be installed in European Drawer Rack 2 (EDR-2) International Space Station (ISS), investigate drop weightlessness. In this work, we concentrate on preliminary experimental results hydrofluoroether (HFE-7100) sounding rocket that has performed frame...
A solution to a benchmark problem for three-dimensional mixed-convection flow in horizontal rectangular channel heated from below and cooled above (Poiseuille-Rayleigh-Bénard flow) is proposed. This steady thermoconvective longitudinal roll large-aspect-ratio at moderate Reynolds Rayleigh numbers (Re = 50, Ra 5,000) Prandtl number Pr 0.7. The model based on the Navier-Stokes equations with Boussinesq approximation. We propose reference solutions resulting computations large grids, Richardson...
Abstract A study emphasizing the effects of passive vortex generators (VGs) on aerodynamic characteristics a NACA 4415 airfoil is presented. Both experimental and numerical works have been carried out an array VGs attached to airfoil. Lift drag measurements are made at various angles attack by using three‐axis component balance system. On side, Reynolds‐averaged Navier‐Stokes (RANS) equations solved with ANSYS FLUENT 14.5 commercial code fully structured mesh three turbulence models...
A numerical model is developed for the simulation of moving interfaces in viscous incompressible flows. The based on finite element method with a pseudo-concentration technique to track front. Since Eulerian approach chosen, interface advected by flow through fixed mesh. Therefore, material discontinuity across cannot be described accurately. To remedy this problem, has been supplemented local mesh adaptation technique. This latter consists updating at each time step position, such that...
A numerical model has been developed for the 2D simulation of free surface flows or, more generally speaking, moving interface ones. The bulk fluids on both sides are taken into account in simulating incompressible laminar flow state. In case heat transfer whole system, i.e. walls as well possible obstacles, is considered. This based finite element analysis with an Eulerian approach and unstructured fixed mesh. special technique to localize allows its temporal evolution through this Several...
Abstract This study investigates, by means of numerical simulation, coupled gravity and capillarity-driven thermoconvection a fluid layer heated from below (Be´nard-Marangoni convection), close to the threshold in small aspect ratio containers. First, we present broad validation model have developed onto widely recognized results available experimental, theoretical, fields. Furthermore, report obtained analyzing dependence on convective cell pattern container shape. In smallest range only...