Solar radiation impact on nanofluid flow and heat transfer between magnetized stretchable discs with variable thermal...

This article enunciates the effects of slip in an axisymmetric flow of non-Newtonian fluid via Buongiorno model with non-linear variable thermal conductivity and variable electric conductivity between two stretchable discs. Through the application of similarity transformations, the system of governing partial differential equations is systematically reduced and expressed in the form of coupled ordinary differential equations. The transformed system is resolved by HAM (homotopy analysis method) and the obtained results for skin friction coefficient, Nusselt number and Sherwood number are then compared with the results attained by SM (shooting method). The effect of several conspicuous parameters on velocity, thermal and concentration profiles are perceived through graphical data. The nanoparticles' whirling between discs is assessed via thermophoretic diffusion and Brownian movement parameters in the flow of Casson nanofluid. Axial and radial velocity profiles enhance for stretching ratio and declines for Casson material parameter. The concentration profiles enhance when values of thermophoresis parameter are increased while an inverse trend for Brownian motion parameter is noticed. Temperature profile declines for rising values of Prandtl number and Reynolds number. The stretching behavior of discs is observed through tabular data by calculating engineering interest quantities at both lower and upper discs simultaneously. Both axial and radial velocity components show decreasing behavior due to increase in electric conductivity. The current analysis may be useful in many engineering applications including automobiles industries, hydraulics and mechanical engineering.