Gravity-driven electromagnetic Casson nanofluid flow with Soret-Dufour and viscous heating effects over a porous slanted cone under non-uniform thermal source/sink: FDM approach

Abstract

This article evaluates the Soret-Dufour diffusion, Joule heating and heat-dissipation effects on two-dimensional unsteady gravity-driven electromagnetic flow of Casson nanofluids over a vertically slanted cone entrenched porous medium with variable thermal source/sink and higher-order chemical reactions. Specifically, two distinct nanofluids are synthesized by mixing two types Agand Cunanoparticles with the blend of water and ethylene-glycol as the base fluid. The explicit DuFort-Frankel finite difference scheme has been executed to discretize and solve the ultimate partial differential system. The research findings uncovered that the temperature fields noticeably increased for both nanofluids by the Eckert parameter, radiation, Soret and Dufour impacts but it decays with nanoparticles capacity fraction. The Soret parameter and chemical reaction order elicited to expand concentration fields for both nanofluids but chemical reaction and Schmidt number revealed opposite effect. Likewise, the velocity fields lowered for both nanofluids by the cone’s inclination angle, magnetic intensity and Casson parameter whereas the porosity, radiation and Eckert number caused to inflate the velocity fields for both nanofluids. The surface-friction improved for both nanofluids by the magnetic field, Casson and Dufour parameters but it was decayed by the nanoparticle’s concentration. An upsurge in magnetic field, thermal source and sink caused to downgrade Nusselt number for both nanofluids but the nanoparticle’s volume fraction exhibited opposite trend. The Sherwood number for both nanofluids enhanced with Schmidt number but it was decreased with chemical reaction and nanoparticles volume-fraction.