Assisting and opposing flow of a MHD hybrid nanofluid flow past a permeable moving surface with heat source/sink and thermal radiation

Abstract

The aim of the current investigation is to study the assisting and opposing flow effects on hybrid nanofluid ( SiO 2 - MoS 2 /water) flow past a moving surface under the impact of heat source/sink, thermal radiation and velocity slip. Also, the moving surface is exposed to convective heating and surface is assumed to be permeable in an attempt to achieve the suction/injection of hybrid nanofluid boundary layer through the surface. As a novelty, we have presented a comparative analysis of all the results for assisting and opposing flow cases. Similarity transformations are utilized to transcribe the momentum and thermal equations in non-dimensional form. The “bvp4c” solver is used to solve the hybrid nanofluid flow problem numerically. Effects of the assisting and opposing flow with nanoparticles volume fraction, heat source/sink, Biot number, thermal radiation parameter, velocity slip parameter and suction/injection parameter on the temperature and velocity profiles are studied. The variations in skin friction and heat transfer coefficient are discussed through tables outlined and three-dimensional figures. Results reveals that hybrid nanofluid velocity is higher in case of assisting flow in comparison to opposing flow. The role of increasing values of Biot number and thermal radiation parameter is to surge the temperature of the hybrid nanofluid ( SiO 2 - MoS 2 /water) flow as well as rate of heat transfer at the surface. The nanoparticles volume fraction (of MoS 2 and SiO 2 ) also enhances the temperature at the wall. It is revealed that slip parameter has contrary effects on both heat transfer and skin friction coefficient for assisting and opposing flow.