MHD Al2O3/Cu-water Casson hybrid nanofluid flow across a porous exponentially stretching sheet

Abstract

This study examines the heat and mass transmission of MHD Al₂O₃-Cu / H₂O Casson hybrid- across an exponentially stretching porous sheet under the effect of non-uniform heat source/sink and chemical reaction. The nonlinear coupled ODEs are solved using the 3-stage Lobatto IIIa formula and the built-in MATLAB scheme Bvp4c after being converted from the governing nonlinear PDEs by appropriate similarity transformations.  The numerical findings are compared with previously available works of literature in order to validate our investigations, and it transpires that there is a good agreement. Graphs are used to illustrate how dimensionless parameters such as the Casson parameter, magnetic parameter, radiation parameter, porosity parameter, Lewis number, the non-uniform heat source/sink parameter, and chemical parameter may affect a system. The impact of the Casson parameter on skin friction coefficient, Nusselt number, and Sherwood number are depicted in the table. The Casson hybrid nanofluid has been found out to have a greater thermal conductivity than the comparable Casson nanofluid. It was also found that the absolute value of the coefficient of skin friction & Nusselt number for Casson hybrid-nanofluid is increased by about 28% and 15% respectively when compared with Casson nanofluid.