Heat transfer and nanofluid flow in suction and blowing process between parallel disks in presence of variable magnetic field

In this paper, nanofluid flow and heat transfer analysis between two parallel disks are investigated using Least Square Method (LSM) and numerical method. A variable magnetic field is applied to the lower stationary disk and the upper disk can move towards or away from the lower disk. After obtaining the governing equations and solving them by LSM, the accuracy of results is examined by fourth order Runge-Kutta numerical method, then the influence of the Squeeze number (S). Hartmann number (M). Brownian motion parameter (Nb), thermophrotic parameter (Nt) and Prandtl number (Pr) on Nusselt number (Nu), Sherwood number (Shr), non-dimensional temperature, velocity and nanoparticle concentration are investigated. The results indicated that by increasing the Nb and Nt, Nusselt number increases, but Sherwood number decreases with Nt and increases with Nb. (C) 2013 Elsevier B.V. All rights reserved.