TY  - EJOU
AU  - Ja, A. 
AU  - Cheddadi, A. 

TI  - Numerical Simulation of Thermosolutal Convective Transitions in a Very Narrow Porous Annulus under the Influence of Lewis Number
T2  - Fluid Dynamics \& Materials Processing

PY  - 2017
VL  - 13
IS  - 4
SN  - 1555-2578

AB  - 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 <i>R</i>=1.05, in the case of equal buoyancy forces (<i>N</i>=1), for a Rayleigh number <i>Ra</i>=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. 
KW  - Thermosolutal convection
KW  -  Porous medium
KW  -  Annular geometry
KW  -  Finite Difference
KW  -  Critical Lewis number

DO  - 10.3970/fdmp.2017.013.235