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production of kinetic energy Pk near wall cell?

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Old   April 30, 2020, 04:00
Question production of kinetic energy Pk near wall cell?
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The production of kinetic energy near wall cell is referred by which paper?

G0[celli] +=
w
*(nutw[facei] + nuw[facei])
*magGradUw[facei]
*Cmu25*sqrt(k[celli])
/(kappa_*y[facei]);


I found Spalding's formula is not the same as above (Pk =Cmu^0.25*Utau^2*U/y). Anybody knows this issue?
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Old   May 1, 2020, 06:19
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Nobody is interested in this issue?
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Old   May 1, 2020, 13:20
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You can find the answer here: Wall functions - questions about implementation
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Old   May 3, 2020, 17:13
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most of the time papers do not equate to the actual implementations. some code involve heuristic changes based on extensive number of tests in various scenarios.
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Old   May 4, 2020, 04:50
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Quote:
Originally Posted by CFD_10 View Post
Thanks for your reply. It helps a lot.
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Old   May 4, 2020, 04:55
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Quote:
Originally Posted by HPE View Post
most of the time papers do not equate to the actual implementations. some code involve heuristic changes based on extensive number of tests in various scenarios.

Yes. I am confused that the difference between those two methods for calculating Gk which I found in one paper. It seems that they are consistent with each other. But after I used those two formula, which leads to different results.
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Old   May 6, 2020, 09:44
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Quote:
Originally Posted by qi.yang@polimi.it View Post
Yes. I am confused that the difference between those two methods for calculating Gk which I found in one paper. It seems that they are consistent with each other. But after I used those two formula, which leads to different results.
Nobody can explain this issue?
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