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August 28, 2010, 10:52 |
what is nutilda?
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#1 |
Senior Member
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Dear Foamers,
What is nutilda? i found it in 0 folder of les and kepsilon of pisoFoam tutorial (also other solvers). what should be its value in boundaries: wall, inlet, outlet ? Best, |
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August 28, 2010, 21:22 |
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#2 |
Senior Member
Chris Sideroff
Join Date: Mar 2009
Location: Ottawa, ON, CAN
Posts: 434
Rep Power: 22 |
nuTilda is for the Spalart-Allmaras turbulence model (the value solved for that determines the turbulent vicosity). See: http://www.cfd-online.com/Wiki/Spalart-Allmaras_model
The nuTilda file will ignored unless you have enabled the SA turbulence model. |
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August 29, 2010, 11:24 |
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#3 | |
Senior Member
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Quote:
do you mean it is not important when using k-e, LES & ... turbulence methods? it is available in o folder of these tutorials. also tell me about "nut" and "nusgs" if possible. Regards, Maysam |
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August 28, 2012, 10:38 |
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#4 |
Senior Member
Canakkale Dardanelspor
Join Date: Aug 2012
Posts: 135
Rep Power: 14 |
nuSgs is the choice of wall function for the incompressible LES. Simply, kinematic viscosity.
Check it out? http://www.openfoam.org/docs/user/turbulence.php |
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October 11, 2012, 12:26 |
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#5 |
Member
Sagun Tripathi
Join Date: Aug 2012
Location: Amherst, USA
Posts: 78
Rep Power: 14 |
Hello everyone,
In continuation with the topic, how does one determine the values of kqRWallFunction and epsilonWallFunction? Thanks, Sagun |
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