Unsteady MHD flow with heat transfer in a diverging channel

In this paper, we investigate the combined effects of unsteadiness and a transversely imposed magnetic field on viscous incompressible fluid flow and heat transfer in a slowly varying exponentially diverging symmetrical channel. The nonlinear governing equations are obtained and solved analytically using a perturbation technique. Graphical results are presented and discussed quantitatively for various flow characteristics like axial velocity, temperature, axial pressure gradient, wall shear stress and Nusselt number. (authors)