Numerical Three-Dimensional Double Diffusion Poiseuille-Rayleigh-Benard Flows in Rectangular Channels

Omar Rahli; K. Bouhadef; Rachid Bennacer; Djamel Eddine Ameziani

doi:10.4028/www.scientific.net/DDF.283-286.297

Paper Titles

Diffusion and Transformation of Eutectic Carbides in High-Speed Steels during Heat Treatment
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Diffusion and Structural Changes in High-Speed Steels Alloyed with Boron
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Analysis of Phase Transformation of Austenitic 316L Implant Steel during Compression
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Modification of Sintered 316L Stainless Steel by Addition of Calcium Pyrophosphate
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Numerical Three-Dimensional Double Diffusion Poiseuille-Rayleigh-Benard Flows in Rectangular Channels
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Simulation of a Liquid Droplet Impinging on a Horizontal Solid Substrate Using Lattice Boltzmann Moment Model
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Exhaust Thermal Energy Use and Optimization in Remote Areas
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Evaluation of Environmentally Friendly Zr Based Nano Structured Conversion Coating for HRS (Hot Rolled Steel) in Powder Coating
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Early Stage of Solid State Interfacial Reaction between Copper and Tin
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Numerical Three-Dimensional Double Diffusion Poiseuille-Rayleigh-Benard Flows in Rectangular Channels

Abstract:

The contribution of this work is to characterize the travelling wave’s appearance and to generalize the behavior of Poiseuille-Rayleigh-Benard (PRB) systems for a broad range of dimensionless parameters, which control the double diffusive mixed convection. The numerical results consist to analyzing the flow regimes of the steady longitudinal thermoconvectives rolls for the case of purely thermal mixed convection and for both thermal and mass diffusion. The passage from an opposed volume forces to cooperating one at fixed Rayleigh (Ra), Reynolds (Re) and Lewis (Le) numbers, affects considerably the birth and the development of the longitudinal rolls R//. The distribution of the heat and mass transfer, presented by the average Nusselt and Sherwood numbers, is also examined.