|August 31, 2013, 10:36||
Turbulent frequency equation for compressible kOmegaSST turbulence model
Join Date: Oct 2012
Posts: 13Rep Power: 5
I have one question that concerns turbulent frequency equation in compressible kOmegaSST equation (I mean "omega equation")...
There is the definition of SuSP term in Programmers Guide: SuSp(rho,phi) = rho*phi
In turbulent frequency equation:
rho_*(F1 - scalar(1))*CDkOmega/omega_,
which (by the programmers guide) means: (rho_*(F1 - scalar(1))*CDkOmega/omega_)*omega_
Why don't we simply write: rho_*(F1 - scalar(1))*CDkOmega ?
|September 6, 2013, 06:45||
Join Date: Sep 2010
Posts: 317Rep Power: 10
I guess this is part of the numeric magic of OpenFOAM:
fvm::SuSp can be used to either add a source term explicitly or implicitly to an equation depending on the sign of the factor. This can improve the stability by increasing the diagonal dominance of the matrix.
See for example here: http://www.foamcfd.org/Nabla/guides/...x14-410002.4.9
|compressible komegasst, komegasst, omega, omega equation|
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