• UNSTEADY FLOW OF VISCOUS FLUID THROUGH POROUS MEDIUM IN A LONG UNIFORM CHANNEL WHOSE CROSS-SECTION IS CURVILINEAR QUADRILATERAL BOUNDED BY THE RADII AND THE ARCS OF TWO CONCENTRIC CIRCLES
Abstract
The aim of the present paper is to discuss the unsteady flow of a viscous incompressible fluid through porous medium in a long uniform channel whose cross-section is curvilinear quadrilateral bounded by the arcs and radii of two concentric circles. Two particular cases when the pressure gradient is (i) constant (ii) an exponentially increasing function of time have been studied in detail. In particular case all the results of case (i) can be determined from the results of case (ii).
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