Analysis of heat transfer phenomenon in hydromagnetic micropolar nanoliquid over a vertical stretching material featuring convective and isothermal heating conditions

Abstract

This article evaluates the heat transfer mechanism in an incompressible hydromagnetic micropolar nanofluid enclosed in a two-dimensional vertically stretchable material surface in a porous device. In the current study, the developed model features the significant contributions of nonlinear radiative flux, viscous dissipation, Brownian movement together with thermophoresis effects in the transport region. An approach of similarity transformations is employed to transmute the transport equations from partial into ordinary differential equations. The translated equations are then integrated numerically via Runge–Kutta Fehlberg scheme plus shooting technique. From the analysis, it is found that there is an improvement in the mechanism of heat transfer for large magnitude of temperature ratio and radiation parameters due to the application of Convective Heating Condition (CHC) whereas the case of Isothermal Wall Condition (IWC) reveals an opposite direction for these parameters. Besides, an improvement in the magnitudes of the material micropolar term, Eckert number together with thermophoresis and Brownian movement parameters creates a decline in the surface heat transfer for both heating conditions.