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Thermal-diffusion and diffusion-thermo effects on mixed free-forced convective and mass transfer boundary layer flow with temperature dependent viscosity. (English) Zbl 0899.76325

Summary: The thermal-diffusion and the diffusion-thermo effects on the mixed free-forced convective and mass transfer steady laminar boundary flow, over a vertical flat plate, are studied, when the viscosity of the fluid is assumed to vary with temperature. The partial differential equations, governing the problem under consideration, are transformed by a similarity transformation into a system of ordinary differential equations which is solved numerically by applying an efficient numerical technique based on the common finite difference method, a tridiagonal matrix manipulation and an iterative procedure. The effects of the viscosity/temperature parameter \(G_r\), the thermal-diffusion parameter Sr (Soret number) and the diffusion-thermo parameter Df (Dufour number) are examined on the flow field of a hydrogen-air mixture as a non-chemical reaction fluid pair. The numerical results have shown that the above mentioned effects have to be taken into consideration in the fluid, heat and mass transfer processes.

MSC:

76R05 Forced convection
76R10 Free convection
76R50 Diffusion
80A20 Heat and mass transfer, heat flow (MSC2010)
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