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Slow extensional flow past a non-homogeneous porous spherical shell

Rajvanshi S. C., Wasu S.

International Journal of Applied Mechanics and Engineering

2013

Vol. 18, no. 2

491--502

An analytical investigation of extensional flow past a porous spherical shell of finite thickness with velocity slip at the surface is presented. The permeability of the shell varies continuously as a function of the radial distance. The flow in the porous region is assumed to obey Darcy’s Law. The drag has been calculated in terms of normal volume flux rate per unit area of the outer and inner surfaces. Particular cases of flow past a homogeneous sphere and no-slip boundary condition have been deduced.