yplus postProcessing formula
where does this formula that is used for yPlus come from?!
I have not seen such expression so far but differently.where can I find an article or page about such expression? Code:
turbulence { |
i have found that this expression is y star not y plus.
How such an obvious mistake has been made here in a tutorial of OpenFOAM? |
how can modify it to true expression?very important to me.
(my case is compressible,kOmegaSST turbulence model) |
in mutkWallFunctionFvPatchScalarField the equation uses for y-plus is related to y-star not y-plus
Code:
y-star=pow(0.09,0.25)*sqr(k)*nearDist()/mu Code:
y-plus=rho*u_star*y/mu which u*=aqrt(taw_w/rho) in the code of mut : Code:
forAll(mutw, faceI) |
I reported this as a bug:
http://www.openfoam.org/mantisbt/view.php?id=835 could anyone help.the answer is not acceptable to me.I want to know the true yPlus in a turbulent kOmegaSST with yplus<=1 to be sure that separation regions and adverse pressure gradients are calculated and included truely not through some "wall-function rough estimations". maybe someone dosn't want to use wall functions. I want "y plus" exactly and only "y plus" not "y star" or any other thing instead of "y plus":mad: could anyone help? please don't hesitate. (I have see some modified files for yPlusRAS but they don't work in 2.2.0 version) |
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