Investigation of mixed convection flow of Carreau nanofluid over a wedge in the presence of Soret and Dufour effects

Abstract

The main purpose of present investigation is to discuss the local non similar solutions of MHD Carreau nano-fluid flow over a wedge in the presence of Brownian motion and thermophoresis effects. Moreover heat and mass transfer characteristics of mixed convection flow are also taken into account with diffusion-thermo (Dufour) and thermal-diffusion (Soret) effects. The wedge surface is sustained at a constant temperature and a constant nano-particle volume fraction. The study is directed through the local non-similar method (LNM) and utilized to convert the governing equations into a system of nonlinear ordinary differential equations. The resulting differential equations of momentum, temperature and concentration are solved through a numerical approach namely bvp4c. Outcomes for the rate of heat and mass transfer are discussed for the parametric variation of magnetic parameter M, wedge angle parameter ξ, Prandtl number Pr, Schmidt number Sc, Soret number Sr, Dufour number Du, Brownian motion parameter Nb, thermophoresis parameter Nt and variable wall temperature and concentration. The graphical and numerical outcome show the considerable decrease in Nusselt number with the increase in Brownian motion parameter and thermophoresis parameter. It is noticed that increasing values of wedge angle parameter ξ increases the velocity profile but opposite trend is observed for the temperature profile. A comparison is made with the earlier published work and found to be in a good agreement.