Combined convection in an axisymmetric stagnation flow of micropolar fluid

Abstract

An analysis is presented to study the effects of buoyancy on forced convection in an axisymmetric stagnation flow of micropolar fluids over a vertical cylinder with constant or linear variation of surface heat flux conditions. Numerical solutions are given for the governing momentum, angular momentum and energy equations. Two flow regions, namely the buoyancy‐assisted and buoyancy‐opposed cases are analysed. It is observed that the wall shear stress and surface heat transfer rate increase or decrease with the buoyancy force parameter depending on the flow regime being buoyancy‐assisted or buoyancy‐opposed respectively.