Thermal stratification and suction/injection effects on flow and heat transfer of micropolar fluid due to stretching cylinder

Abstract

SUMMARYIn this paper, a numerical solution of flow and heat transfer in micropolar fluid outside a stretching permeable cylinder with thermal stratification and suction/injection effects. The governing system of partial differential equations is converted to ordinary differential equations by using similarity transformations, which are then solved using numerical technique. The cases of strong concentration of microelement and weak concentration of microelement were considered. Our purpose from this study is to investigate the effects of the governing parameters, namely the suction/injection parameter, thermal stratification parameter, Prandtl number, vortex viscosity parameter and Reynolds number on the velocity profiles, pressure distributions, angular velocity profiles and temperature profiles as well as the skin friction coefficient, dimensionless wall couple stress and the Nusselt number. The numerical results are validated by favorable comparisons with previously published results. The results are shown graphically. The values of the skin friction coefficient, dimensionless wall couple stress and the Nusselt number are presented in tables.

Mixed-convection boundary-layer flow of Sisko fluid along a stretching cylinder in a thermally stratied medium

“…Due to numerous implementations in uid mechanics, many researchers have worked on strati cation phenomenon. The ow due to a heated surface immersed in a stable strati ed medium has been investigated experimentally and analytically in several studies such as Yang et al [18], Jaluria and Gebhart [19], Chen and Eichhorn [20], Ishak et al [21], Mukhopadhyay et al [22], and Mansour [23] etc.…”