Authors: C Y Wang
Publish Date: 2008/02/07
Volume: 75, Issue: 1, Pages: 55-62
Abstract
Analytical solutions are found for the transient starting flow due to a sudden pressure gradient in cylindrical rectangular and parallel plate ducts fill with a Darcy– Brinkman porous medium It is found that for all geometries the initial velocity front is flat It eventually becomes more parabolic for small porous media parameter s but remains flat for large s The boundary layer thickness is of order 1/s The transient is also shorter proportional to exp−s 2 t for large s
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