eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2008 20 3 599 604 jusps-B 1383 article N.P. SINGH 1 AJAY KUMAR SINGH 2 ATUL KUMAR SINGH 1 P.K. SHARMA 1 Department of Mathematics, V.S.S.D., College, Kanpur - 208002 (INDIA) Department of Mathematics, C.I. Jain (P.G.) College, Firozabad - 283203 (INDIA) <p style="text-align: justify;">In this paper free convection flow along a horizontal porous plate is studied in the presence of heat source and taking into account the periodic free stream velocity and temperature. Following perturbation technique, solutions for liquid velocity and temperature fields are obtained. Expressions for skin-friction and heat transfer are also derived. The results obtained are discussed for different values of the parameters entered into the equations governing the flow. It is observed that the velocity decreases with increase in permeability parameter while the temperature decreases with increase in Prandtl number or absorption type heat source.</p> https://ultraphysicalsciences.org/paper/1383/ Unsteady porous medium past horizontal porous plate