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 *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.
KW - Thermosolutal convection
KW - Porous medium
KW - Annular geometry
KW - Finite Difference
KW - Critical Lewis number
DO - 10.3970/fdmp.2017.013.235