Magnetohydrodynamic stagnation-point flow of Sisko nanofluid over a stretching sheet with suction

A numerical investigation is presented to show the effects of thermo-diffusion on the hydromagnetic stagnation-point flow of Sisko nanofluid over a linearly stretching sheet by considering viscous dissipation and Joule heating with suction/injection.A suitable set of similarity transformations is considered in order to convert the basic partial differential equa­tions into a set of coupled nonlinear ordinary differential equations.An efficient numerical method along with shooting technique is involved in older to solve the reduced governing basic equations.The influences of several emerging physical parameters of Sisko nanofluid on the profiles of velocity,temperature,solutal concentration,nanoparticle volume fraction,skin-friction coefficient,Nusselt number,and Sherwood number have been studied and analyzed in detail through graphs and tables.It is found that the skin friction coefficient decays more rapidly against the material parameter of Sisko fluid.ALso,it is noticed that the Brownian mo­tion and thermophoresis parameter have the reverse effects on Sisko nanofluid Sherwood num­ber.It is analyzed that the Nusselt number decreases with an increase in the values of thermophoresis parameter.Brownian motion parameter,and Eckert number,while its value in­creases with material parameter and Dufour solutal Lewis number.It is observed that the Sher­wood number has ascending behavior for thermophoresis and.Brownian motion parameters,whereas nanofluid Sherwood number gets amplified with a hike in the nano Lewis number parameter for all the values of Brownian motion parameter.

Double diffusive magnetohydrodynamic heat and mass transfer of nanofluids over a nonlinear stretching/shrinking sheet with viscous-Ohmic dissipation and thermal radiation

The study of magnetohydrodynamic(MUD)convective heat and mass transfer near a stagnation-point flow over stretching/shrinking sheet of nanofluids is presented in this paper by considering thermal radiation,Ohmic heating,viscous dissipation and heat source/sink parameter effects.Non-similarity method is adopted for the governing basic equations before they are solved numerically using Runge-Kutta-Fehlberg method using shooting technique.The numerical results are validated by comparing the present results with previously published results.The focus of this paper is to study the effects of some selected governing parameters such as Richardson number,radiation parameter,Schimdt number,Eckert number and magnetic parameter on velocity,temperature and concentration profiles as well as on skin-friction coefficient,local Nusselt number and Sherwood number.