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Compressibility correction for SST model #2271
Compressibility correction for SST model #2271
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Added two compressibility correction( Wilcox and Zeman ) for the SST model.
That would be a nice addition! Can you also add a testcase (this flat plate testcase) for each of the cases, and add the cfg + regression tests to this repository? Maybe do the regression test on one of the coarsest meshes. Best would be to have set it up with a restart file that is completely converged. |
Regrading the results: Why do we not see the dip in skin friction coefficient for low Reynolds like we see in the paper of Rumsey? The paper shows that predicting this dip is a feature of the model, and it makes it different from the van Driest theory. |
regression Test
…on' into feature_Compressibility_Correction
Regression
Regression
remove hybrid/ add parallel
Wilcox_Regression
Regression test for Wilcox and Sarkar .
Sarkar
Regression Test
Hi @bigfooted. I made regression test on "parallel_regression.py". Should I make extra regression test on "hybrid_regression.py" and "serial_regression.py"? |
I copy the comment in the review here as well: You have in the code |
Co-authored-by: Pedro Gomes <[email protected]>
Co-authored-by: Pedro Gomes <[email protected]>
Co-authored-by: Pedro Gomes <[email protected]>
Sarkar Regression
Can you add the updated results here? Did the results improve? |
Hi @bigfooted , I'm sorry to forgot shearing the updated result. Here is the result fixed for the correct source term. The Cf is slightly shifted up. |
@pcarruscag @sun5k Anything else necessary for this PR? |
TestCases/rans/flatplate/turb_SST_flatplate_compressibility_Sarkar.cfg
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TestCases/rans/flatplate/turb_SST_flatplate_compressibility_Wilcox.cfg
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Co-authored-by: Pedro Gomes <[email protected]>
Co-authored-by: Pedro Gomes <[email protected]>
Co-authored-by: Pedro Gomes <[email protected]>
Co-authored-by: Pedro Gomes <[email protected]>
Break SU2 code, if either options is selected.
Proposed Changes
Compressibility Correction(CC) for the k-w SST model.
Two kind of CC is implemented. Both CC were based on Wilcox's book(Turbulence Modeling for CFD 3rd) and the paper of Rumsey
The k-w SST model transport equation :
*The production term is according to version or options for SST model(SU2 ver 8.0.1 has 1994m or 2003m).
Wilcox
The H is the Heaviside function.
Sarkar
In the Sarkar's CC, the pressure dilatation() is considered. The k transport equation is :
Validation Case
Validation analysis is conducted for the hypersonic flat plate. Two different wall temperature(T_w/T_free = 1.090 and T_w/T_free = 2.725) results are presented and compared with simulation results of ANSYS Fluent.
The CC of Fluent and Wilcox is almost same, but they have different coefficients(Wilcox : / Fluent : ). So, The results show a similar behavior to the Fluent results.
PR Checklist
Put an X by all that apply. You can fill this out after submitting the PR. If you have any questions, don't hesitate to ask! We want to help. These are a guide for you to know what the reviewers will be looking for in your contribution.
pre-commit run --all
to format old commits.