Impact of an oblique stagnation point on MHD micropolar nanomaterial in porous medium over an oscillatory surface with partial slip

The aim of this article is to characterize the influences of Lorentz forces, velocity slip and the thermal jump condition on the unsteady flow and heat transfer analysis of micropolar nanofluid. The fluid is embedded in a porous medium in the vicinity of an oblique stagnation point along an oscillating surface. The external magnetic field is applied parallel to the dividing streamlines. Further, the analysis is based upon two types of metallic nanoparticles (copper $\left(Cu\right)$ and alumina $\left(A{l}_2{O}_3\right)$) within the acting base fluid water. Both nanomaterials are analyzed separately, and a comparison is made for heat transfer and wall shear stresses subjected to both strong and weak concentrations of micro-molecules. Similarity variables are used to transmute the governing partial differential equations into a set of non-linear coupled ordinary differential equations. The problem is then solved numerically utilizing a built-in computer software program. Variations in velocity, temperature and microrotation are illustrated in graphs to report the impact of various controlling parameters. Numerical details of microrotation distribution, skin friction and heat transfer rates for the various thermophysical parameters are portrayed in tables. It is noted that by increasing the permeability of the porous medium the velocity distribution drops, while the wall shear stress enhances. The heat transfer rate also escalates due to an increase in the porosity effect because of dominant conduction. The streamlines are also presented to examine the fluid flow behavior. (paper)