Augmentation of mixed convection heat transfer in a lid-assisted square enclosure utilizing micropolar fluid under magnetic environment: A numerical approach

Abstract

The present article comprises numerical simulations against mixed convection thermal transfer within a lid steered square geometry comprising micropolar liquid material with the incorporation of consistent magnetic environment. The lower straight wall of the container is supposed to be heated uniformly and the rest of the sides are maintained at lesser temperature. The finite element analysis is carried out by Galerkin weighted residual to obtain results against extensive ranges of involved flow parameters such as micropolar parameter, Reynolds, Grashof and Hartmann numbers. The results achieved during the present numerical investigation reveal that a larger Grashof number enhances the stability of streamline circulations. Moreover, the enhancement in Reynolds and Hartmann numbers decreases the stability of streamline circulations. The convective regimes are found dominant than that of the conduction for small Hartmann and large Grashof numbers. Furthermore, thermal transfer is observed for the micropolar parameter, Hartmann and Reynolds numbers. It is noticed that thermal exchange factor is decreasing with respect to the Grashof number at the top side of the container whereas an inclusive heat transfer measure enhances by raising the Grashof number and declines against the Reynolds and Hartmann numbers, near the heated wall.