Soret and Dufour Effects on Double-Diffusive Free Convection Over a Vertical Truncated Cone in Porous Media with Variable Wall Heat and Mass Fluxes

2011 ◽  
Vol 91 (3) ◽  
pp. 877-888 ◽  
Author(s):  
Ching-Yang Cheng
Keyword(s):  
Porous Media ◽  
Free Convection ◽  
Soret And Dufour Effects ◽  
Truncated Cone ◽  
Mass Fluxes ◽  
Variable Wall ◽  
Double Diffusive

DOUBLE DIFFUSIVE FREE CONVECTION ALONG A VERTICAL SURFACE IN A DOUBLY STRATIFIED POROUS MEDIUM WITH SORET AND DUFOUR EFFECTS UNDER MHD FORCES

2017 ◽  
Vol 20 (10) ◽  
pp. 865-879
Author(s):  
S.V.S.S.N.V.G. Krishna Murthy ◽  
Frédéric Magoulès ◽  
B. V. Rathish Kumar ◽  
Vinay Kumar
Keyword(s):  
Porous Medium ◽  
Free Convection ◽  
Vertical Surface ◽  
Soret And Dufour Effects ◽  
Double Diffusive

scholarly journals Analytical and Numerical Study of Soret and Dufour Effects on Double Diffusive Convection in a Shallow Horizontal Binary Fluid Layer Submitted to Uniform Fluxes of Heat and Mass

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
A. Lagra ◽  
M. Bourich ◽  
M. Hasnaoui ◽  
A. Amahmid ◽  
M. Er-Raki
Keyword(s):  
Numerical Study ◽  
Fluid Layer ◽  
Horizontal Layer ◽  
Thermosolutal Convection ◽  
Constant Heat ◽  
Soret And Dufour Effects ◽  
Binary Fluid ◽  
Mass Fluxes ◽  
Diffusive Convection ◽  
Double Diffusive

Combined Soret and Dufour effects on thermosolutal convection induced in a horizontal layer filled with a binary fluid and subject to constant heat and mass fluxes are investigated analytically and numerically. The thresholds marking the onset of supercritical and subcritical convection are predicted analytically and explicitly versus the governing parameters. The present investigation shows that different regions exist in the N-Du plane corresponding to different parallel flow regimes. The number, the extent, and the locations of these regions depend on whether SrDu>-(1+Le2)/2Le2=f(Le) or SrDu<-(1+Le2)/2Le2. Conjugate effects of cross-phenomena on thresholds of fluid flow and heat and mass transfer characteristics are illustrated and discussed.

A Study of Double Diffusive Free Convection From a Corrugated Vertical Surface in a Darcy Porous Medium Under Soret and Dufour effects

2011 ◽  
Vol 133 (9) ◽  
Author(s):  
S.V.S.S.N.V.G. Krishna Murthy ◽  
B.V. Rathish Kumar ◽  
Peeyush Chandra ◽  
Vivek Sangwan ◽  
Mohit Nigam
Keyword(s):  
Boundary Layer ◽  
Porous Medium ◽  
Free Convection ◽  
Nonlinear Partial Differential Equations ◽  
Lewis Number ◽  
Boussinesq Approximation ◽  
Vertical Surface ◽  
Soret And Dufour Effects ◽  
Boundary Layer Equations ◽  
Double Diffusive

This study examines the influence of Soret and Dufour effects on double diffusive free convection due to wavy vertical surface immersed in a fluid saturated semi-infinite porous medium under Darcian assumptions. A wavy to flat surface transformation is applied, and the resulting coupled nonlinear partial differential equations under Boussinesq approximation are reduced to boundary layer equations. A finite difference scheme based on the Keller-Box approach has been used in conjunction with block-tridiagonal solver for obtaining the solution for boundary layer equations. Results from the current study are compared with those available in literature. The effect of various parameters such as wave amplitude (a), Lewis number (Le), buoyancy ratio (B), and Soret (Sr) and Dufour (Df) numbers are analyzed through local and average Nusselt number, and local and average Sherwood number plots.

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