realizableKEpsilon is very sensitive to inlet condition

sharonyue · February 20, 2024, 05:04

After many test cases launched on different geometries, I found realizableKEpsilon is very sensitive to the inlet turbulence condition. You can run the pitzDaily test case by adjusting only the k inlet value. In the following 4 tests, I set them as:

kEpsilon: kInlet = 0.375
kEpsilon: kInlet = 0.0375
realizableKEpsilon: kInlet = 0.375
realizableKEpsilon: kInlet = 0.0375

You can see the first three predict almost same nut. But the last one does not.

sharonyue · February 20, 2024, 07:25

I have no idea why I cannot upload more pictures (404 forbidden), I will come back to update again.

February 20, 2024, 07:25		#2
sharonyue Senior Member Dongyue Li Join Date: Jun 2012 Location: Beijing, China Posts: 838 Rep Power: 17	I have no idea why I cannot upload more pictures (404 forbidden), I will come back to update again. __________________ My OpenFOAM algorithm website: http://dyfluid.com By far the largest Chinese CFD-based forum: http://www.cfd-china.com/category/6/openfoam We provide lots of clusters to Chinese customers, and we are considering to do business overseas: http://dyfluid.com/DMCmodel.html

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