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buoyantPimpleFoam calculates non-physical thick boundary layers/velociities in pipe

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Old   July 30, 2013, 20:24
Default buoyantPimpleFoam calculates non-physical thick boundary layers/velociities in pipe
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Joachim Herb
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Hi,

I have a problem with buoyantPimpeFoam reported at the official bug tracker: http://www.openfoam.org/mantisbt/view.php?id=936

The test case (attached to the bug report) for a (2D) pipe flow simulated with buoyantPimpleFoam results in (non-physical) too thick boundary layers at the walls and therefore in a (much) too high central velocity in the pipe. Using buoyantSimpleFoam to simulate the same case shows results as expected. (Using the stationary result as initialization for the transient calculation does not help.)

(Doubling the number elements in the radial direction does not help either.)

Any help is appreciated
Thank you
Joachim

buoyantSimpleFoam



with buoyantPimpleFoam after 2 s (its getting worse and worse):


Last edited by jherb; July 31, 2013 at 05:25.
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boundary layer, boundary layer thickness, buoyant flow, buoyant solver, buoyantpimplefoam

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