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Combining compressible incompressible equations in cht

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Old   December 23, 2015, 13:35
Default Combining compressible incompressible equations in cht
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Hey there,

I made two modifications of the chtMultiRegionSimpleFoam Solver. One with the equations from rhoSimpleFoam (chtCompressible), the other with the simpleFoam (chtIncompressible) equations.
I found this out: if I set the thermodynamic properties in the chtCompressible solver to "incompressible", then I don't get the same results for for pressure and velocity field as with the chtIncompressible solver (even though after comparing all equations I think the results should be the same).
Now my goal is to make a new cht-solver that unites both (chtIncompressible and chtCompressible) solvers. Did anybody try this before? Are there issues when combining the e.g. turbulence models together?
I don't find any literature about this on the internet and am wondering why nobody tried this before. Or does anybody have an idea why I apparently can't simulate an incompressible fluid withe the compressible equations? I dont have access to a linux computer right now (christmas) but I'm thinking about it all the time...
Thank you so much for ideas and have a great fest.

Best
Kiki
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