Abstract
The aim of this paper is to investigate the effect of thermal
stratification together with variable viscosity on free convection flow of
non- Newtonian fluids along a nonisothermal semi infinite vertical plate
embedded in a saturated porous medium. The governing equations of
continuity, momentum and energy are transformed into nonlinear ordinary
differential equations using similarity transformations and then solved by
using the Runge-Kutta-Gill method along with shooting technique. Governing
parameters for the problem under study are the variable viscosity, thermal
stratification parameter, non-Newtonian parameter and the power-law index
parameter.The velocity and temperature distributions are presented and
discussed. The Nusselt number is also derived and discussed numerically.
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