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Differences between production term in k-epsilon! |
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#1 |
Member
Tom Waits
Join Date: Aug 2018
Posts: 42
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Reading about the production term for k-epsilon here:
https://www.cfd-online.com/Wiki/Stan...-epsilon_model it is given as ![]() but on the NASA website here: https://turbmodels.larc.nasa.gov/ke-chien.html a much more complicated form is given as: ![]() where ![]() I have coded both up and get slightly different results for the production term in my k-epsilon model! Where do these two forms come from and why are they different? Many thanks in advance, Tom Waits |
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#2 | |
Senior Member
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Quote:
The approximation is certainly more stable, that's one of the reasons it got large acceptance. |
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#3 |
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Filippo Maria Denaro
Join Date: Jul 2010
Posts: 6,925
Rep Power: 73 ![]() ![]() ![]() |
The isotropic terms could be absorbed by the “pressure”
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k-epsilon, production, turbulence |
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