MIXED CONVECTION ABOUT A ROTATING SPHERE IN AN AXIAL STREAM

Abstract

This paper presents a finite-difference scheme for solving the boundary layer equations governing laminar mixed (forced and free) convection heat transfer from a rotating sphere that is maintained at uniform surface heat flux and subjected to a uniform stream in the direction of its axis of rotation. Numerical results are presented to show the effect of a superimposed aiding or opposing free convection on the meridional and azimuthal velocities, wall shear stress components, separation angle, local Nusselt number, and wall temperature. As compared with power series studies available in the literature, the present scheme is capable of obtaining solutions for considerably larger values of the parameter Ta/Re².

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Notes on contributors

M. A. I. El-Shaarawi

M. A. I. El-Shaarawi is on leave from the Mechanical Engineering Department, Alazhar University. Nasr City, Cairo, Egypt.