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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 68, 2015 - Issue 6
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Original Articles

Coupling–Diffusive Effects on Thermosolutal Buoyancy Convection in a Horizontal Cavity

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Pages 583-597 | Received 13 Sep 2014, Accepted 01 Dec 2014, Published online: 23 Apr 2015
 

Abstract

Coupling–diffusive effects on thermosolutal buoyancy convection with Soret and Dufour effects in a horizontal cavity are investigated numerically. The problem is formulated using a coupling–diffusive model for thermosolutal buoyancy convection and is solved by the SIMPLE algorithm with the QUICK scheme in a nonuniform staggered grid system. The results show that thermal and solutal buoyancy primarily dominate the structure of the velocity field and that the inflexion points of flow pattern transform as Rayleigh number or buoyancy ratio increases. The parametric study shows that the heat and mass transfer of thermosolutal convection are enhanced as Rayleigh number or buoyancy ratio increases. Soret and Dufour effects have a linear influence on heat and mass transfer in a horizontal cavity so that the coupling–diffusive effects cannot be ignored, especially under high Rayleigh numbers.

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