Combined heat and mass transfer and thermodynamic irreversibilities in the stagnation-point flow of Casson rheological fluid over a cylinder with catalytic reactions and inside a porous medium under local thermal nonequilibrium

The transport of heat and mass from the surface a cylinder coated with catalyst subject to an impinging flow Casson rheological fluid is investigated. features circumferentially non-uniform transpiration embedded inside homogeneous porous medium. non-equilibrium thermodynamics problem, including Soret Dufour effects local thermal in medium, are considered. Through introduction similarity variables, governing equations reduced set non-linear ordinary differential which subsequently solved numerically. This results prediction hydrodynamic, temperature, concentration entropy generation fields, as well average Nusselt, Sherwood Bejan numbers. It shown that, for low values parameter thus strong non-Newtonian behaviour, system has significant tendency towards maintaining equilibrium. Furthermore, show major reduction Nusselt number during transition Newtonian fluid, while less pronounced. also demonstrated that flow, transfer irreversibilities significantly affected by fluid’s strengthened characteristics. physical reasons these behaviours discussed exploring influence other pertinent factors upon thickness boundary layers. noted this study first systematic investigation stagnation-point cylindrical media.