Homotopy solution for the unsteady three-dimensional MHD flow and mass transfer in a porous space

A homotopy analysis method (HAM) is employed to investigate the unsteady magnetohydrodynamic (MHD) flow induced by a stretching surface. An incompressible viscous fluid fills the porous space. The heat and mass transfer analyses are also studied. Series solutions have been constructed. Comparative study between the series and exact solutions is also given. The effects of embedded parameters in the considered problems are examined in detail.