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Numerical Simulation of Thermosolutal Convective Transitions in a Very Narrow Porous Annulus under the Influence of Lewis Number

A. Ja1, A. Cheddadi1
Research Team "Thermal Systems and Real Flows", Mohammadia School of Engineers, Mohammed V University in Rabat, Morocco.

Fluid Dynamics & Materials Processing 2017, 13(4), 235-249. https://doi.org/10.3970/fdmp.2017.013.235

Abstract

This paper reports on the natural convection within a very narrow horizontal annular cavity filled with a porous medium saturated by a binary fluid. The main objective of this study is the identification of the effect of Lewis number on the flow structure and on the heat and mass transfer rates, in a cavity of very small radius ratio R=1.05, in the case of equal buoyancy forces (N=1), for a Rayleigh number Ra=50. The dimensionless governing equations were solved by the centered Finite Difference method using the ADI scheme. Several multicellular flows appear during the variation of the Lewis number, resulting in a direct impact on the heat and solutal transfer rates.

Keywords

Thermosolutal convection, Porous medium, Annular geometry, Finite Difference, Critical Lewis number.

Cite This Article

Ja, A., Cheddadi, A. (2017). Numerical Simulation of Thermosolutal Convective Transitions in a Very Narrow Porous Annulus under the Influence of Lewis Number. FDMP-Fluid Dynamics & Materials Processing, 13(4), 235–249.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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