On stagnation point flow of a micro polar nanofluid past a circular cylinder with velocity and thermal slip

Abstract

The concerned problem is dedicated to study stagnation point flow of MHD micropolar nanomaterial fluid over a circular cylinder having sinusoidal radius variation. Velocity jump slip phenomenon with porous medium is also taken into account. To be more specific, the physical situation of micropolar fluid in the presence of both weak and strong concentration is mathematically modeled in terms of differential equations. Here, three nanoparticles namely Titania (TiO2), Copper (Cu) and Alumina (Al2O3) compared with water as base fluids are incorporated for analysis. The resulting non-linear system has been solved by Runge-Kutta-Fehlberg scheme. Numerical solutions for velocities and temperature profiles are settled for alumina–water nanofluid and deliberated through graphs and numerical tables. It is seen that the skin friction coefficients and the rate of heat transfer are maximum for copper–water nanofluid related to the alumina–water and titania–water nanofluids. Also, the precision of the present findings is certified by equating them with the previously published work. Keywords: Micropolar nanofluid, MHD, Velocity and thermal Slip, Stagnation point, Porous medium