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-   -   Low Mach rhoCentralFoam (http://www.cfd-online.com/Forums/openfoam-solving/117673-low-mach-rhocentralfoam.html)

-Ali May 13, 2013 09:48

Low Mach rhoCentralFoam
 
Dear all
Is there anybody who can help me that how can I setup the rhoCenteralFoam solver for low speed (or low Ma, or low Re) flows?
the geometry consists of a simple parallel plate at micro scale.
My solutions are wrong (for example a reverse flow appears along he channel) .
It seems the solver did not solves for rho (it prints No iteration = 0 for rho, rhoUx and rhoUy.
how can I fixed it?

immortality May 23, 2013 04:11

Hi Ali
it solves continuity equation to obtain rho by "diagonal solver" so rho residuals are zero means exact solution as other compressible solvers like rhoPimpleFoam.
that trouble with reversed flow is related to bad BC in outlet.

-Ali May 25, 2013 08:49

Dear Ehsan

Thanks for your kind informations.
Yes the problem was with the BC as well as IC which is solved now.

immortality May 25, 2013 09:57

your welcome
I'm also intersted in micro scales.
which university are you in?
could you send me your case?


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