A multimedia feature for unsteady magnetic hydrodynamic (MHD) flow of two-dimensional mixed convection flow of an incompressible viscoelastic fluid over a vertical stretching sheet with viscous dissipation was studied. Similar transformation and an implicit finite-difference method were used to analyze the present problem. The numerical solutions of the flow velocity distributions, temperature profiles, the wall unknown values of f"(0) and -' (0) θ for calculating the heat transfer of the

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... r boundary-layer flow were carried out as functions of the unsteadiness parameter (S), the Eckert number (Ec), the Prandtl number (Pr), the magnetic parameter (M), the buoyancy parameter (G), the viscoelastic parameter (α), the space-dependent parameter (A) and temperature-dependent parameter (B) for heat source/sink. The effects of these parameters were also discussed. The results showed that greater heat transfer effect was produced with a larger S and α. On the other hand, parameters G, Pr, Ec, A and B reduced the heat transfer effect at some specific conditions.