FREE CONVECTION IN A NON-NEWTONIAN FLUID SATURATED SQUARE POROUS ENCLOSURE WITH AN ISOTHERMAL CORRUGATED WALL

摘要

In this paper the Darcy natural convection process induced by an isothermal vertical wavy wall in a porous enclosure saturated with power-law type Non-Newtonian fluid is considered. The coupled non-linear partial differential equations modeling such a free convection process are then solved by Finite Element Method (FEM). Numerical results illustrating the effects of the governing parameters such as Rayleigh number (Ra), power-law index (n), number of waves per unit length (N), amplitude of the wavy curve modeling the wall (a), phase of the wavy curve (φ), on the convection process are presented. The flow and temperature fields are analyzed through streamlines, isotherms and Local / Cumulative heat flux plots.