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Forum: OpenFOAM

March 6, 2013, 10:05

Replies: 63

nutWallFunction

Views: 24,096

Posted By alirezaj

Just for correction sake, if some body else...

Just for correction sake, if some body else needs:
I made a mistake in writting. the correct condition is: (y+y_0)/y_0>1+10^-4. It implies that y must be y>10^-4 *y_0

Forum: OpenFOAM

March 6, 2013, 07:45

Replies: 63

nutWallFunction

Views: 24,096

Posted By alirezaj

Roman, You are right. For rough wall I can find...

Roman,
You are right. For rough wall I can find "nutKAtmRoughWallFunction" where the core equation is:
nu_t= nu[(yplus*kappa/ln((y+y_0)/y_0))-1]
1)This equation can be true for all walls (smooth...

Forum: OpenFOAM

March 6, 2013, 06:18

Replies: 63

nutWallFunction

Views: 24,096

Posted By alirezaj

Ok.. It seems really dangerous to use the wall...

Ok.. It seems really dangerous to use the wall functions when u dont know what exactly happens inside them!

Forum: OpenFOAM

March 6, 2013, 05:39

Replies: 63

nutWallFunction

Views: 24,096

Posted By alirezaj

Hi Roman, regarding to standard wall function...

Hi Roman,
regarding to standard wall function derivation here http://www.cfd-online.com/Wiki/Two_equation_turbulence_models#Standard_wall_functions
based on which assumption can you derive...

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