Study of magneto‑hydrodynamics (MHD) impacts on an axisymmetric Casson nanofluid flow and heat transfer over unsteady radially stretching sheet

摘要

The current study is presented to probe the impacts of thermal radiation and mixed convection of axisymmetric Cassonfluid flow in the presence of magnetic field along with nano-particles. The flow is provoked because of unsteady radiallystretching sheet. The solution of transformed ordinary differential equations is attained by utilizing Keller-box finitedifference method (IFDM). The influence of different parameters on flow features is sketched through various graphsand results are tabulated and argued briefly. The convection conditions on the wall temperature and concentration arealso exerted in the study. Finally, a comparison is established with existing literature to support our results and a goodagreement is found which corroborates our work. A decline in both velocity and temperature is witnessed with the risein Casson parameter. It is also observed that with the rise Brownian motion and Thermophoresis parameters, the temperatureof the fluid rises but concentration profile decreases in start and then start increasing. The fluid concentrationin its boundary layer decreases with the increase of heavier species, the parameter of the reaction rate and the exponentof power law for fluid having Prandtl number = 10.0, 15.0, and 20.0. Moreover, the fluid velocity depreciates with the risein unsteadiness parameter while a significant decrease in temperature is noted. The outcomes of study are quite usefulin fabrication of magnetic nano-materials and high temperature treatment of magnetic nano-polymers.