Abstract

MAHDY, A. Thermophoresis particle deposition and variable viscosity effects on non-darcy free convection in a fluid saturated porous media with uniform suction/injection. Lat. Am. appl. res. [online]. 2013, vol.43, n.2, pp.113-119. ISSN 0327-0793.

The main purpose of this investigation is to study the effect of thermophoresis particle deposition in natural convection heat and mass transfer over a vertical flat plate embedded in a fluid-saturated porous medium with variable viscosity effect. The viscosity of the fluid is assumed to be an inverse linear function of the fluid temperature. A boundary-layer analysis is employed to derive the non-dimensional governing equations. The governing equations for this contribution are transformed into a set of non-similar equations and solved numerically using an implicit finite difference technique. Comparisons with previously published work on special cases of the problem are performed and the results are found to be in excellent agreement. A parametric study illustrating the influence of the thermophoresis parameter, thermophoretic coefficient, viscosity-variation parameter, buoyancy ratio the Lewis number, Prandtl number, transpiration parameter and Grashof number on the fluid velocity, temperature and solute concentration profiles as well as the Sherwood number and the wall thermophoretic deposition velocity is conducted

Keywords : Thermophoresis; Porous Media; Variable Viscosity; Natural Convection; Non-Darcy; Suction  or Injection.

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