CFD Online Discussion Forums - what is the correct y+ for SST k-omega with default kqQwallfunction/omegawallfunction

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Yage	January 1, 2016 07:48

what is the correct y+ for SST k-omega with default kqQwallfunction/omegawallfunction

Dear Foamers,

I am a little bit confused about how to choose the correct yplus for SST k-omega,

Some people insist on y+<=1, but some people(references) suggest(use) 300>y+>30.

My current model is a submerged body closed to free surface under constant water current speed (Re=280000). Type kqRwallfunction/omegawallfunction are used for model k and omega boundary

and the y+ value at the moment without added layers are:

Code:

y+ : min: 1.95390971 max: 233.585105 average: 38.0527751

Please could someone suggest me whether I need to add layers for my current model?
Regards,
Yage

wyldckat

January 1, 2016 14:40

Quick answer: Google:

Code:

site:www.dicat.unige.it/guerrero/ omega

I believe it's the presentation "A crash introduction to turbulence modelling in OpenFOAM®" has more details on what you're looking for.

I didn't put up a link, because the presentation is updated once in a while and then the link would be broken in a few months from now :(

Yage	January 1, 2016 15:18

Quote:

Originally Posted by wyldckat (Post 579246)

Quick answer: Google:

Code:

site:www.dicat.unige.it/guerrero/ omega

Dear Bruno,

The reference is quite useful for me

Many thanks and happy new year!

Regards
Yage

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