Abstract
//; thi.K article, the linearized theory is used to study the effect of small amplitude time-dependent sutface temperature oscillations on free convection to a vertical plate embedded in a mm-Darcy porous medium. Forchheimer extension is considered in the flow equations. The time-dependent perturbations are used to transform the i^ovemin^ equations to nvo groups — similar ami nonsimilar. respectively. For the nonsimilar equations, the second-level local nonsimikirity method is used to convert It to a ,vc? of ordinary differential equations. The numerical .solutions are obtained in the comple.x domaiit for a rani-e of the non-Darcy parameter D and the frequency variable t,.
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