Effect of Double Stratification on Mixed Convection in a Micropolar Fluid

Abstract

The effects of thermal and solutal stratification on mixed convection heat and mass transfer along a vertical plate embedded in a micropolar fluid has been studied. The nonlinear governing equations and their associated boundary conditions are initially cast into dimensionless forms by pseudo - similarity variables. The resulting system of equations is then solved numerically using the Keller-box method. The numerical results are compared and found to be in good agreement with previously published results as special cases of the present investigation. The effect of coupling number, mixed convection parameter and double stratification parameters on local skin-friction and wall couple stress coefficients are discussed. An analysis of the results obtained shows that the flow field is influenced appreciably by coupling number, mixed convection parameter, thermal and solutal stratification parameters. Keywords: Mixed convection; Micropolar fluid; Thermal and Solutal Stratification. 2010 Mathematics Subject Classification: 76R05; 76R10; 76A05; 76N20.