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Forum: OpenFOAM Running, Solving & CFD

April 27, 2010, 06:19

Replies: 10

Accuracy of wall shear and velocity

Views: 2,104

Posted By santos

Just to be on the safe side, set nut in 0 in the...

Just to be on the safe side, set nut in 0 in the same way you defined k and epsilon.

Regards,
Jose Santos

Forum: OpenFOAM Running, Solving & CFD

April 27, 2010, 05:55

Replies: 10

Accuracy of wall shear and velocity

Views: 2,104

Posted By santos

I dont think you need to have it in your 0...

I dont think you need to have it in your 0 folder, it will be calculated during run-time from k and epsilon.

Regards,
Jose Santos

Forum: OpenFOAM Running, Solving & CFD

April 26, 2010, 10:38

Replies: 10

Accuracy of wall shear and velocity

Views: 2,104

Posted By santos

I have tried it for Re = 20000. My friction...

I have tried it for Re = 20000. My friction factor results were 5-10% higher than the Blasius equation, which I suspect was mainly due to the uniform inlet velocity profile I assumed. Just make sure...

Forum: OpenFOAM Running, Solving & CFD

April 26, 2010, 10:02

Replies: 10

Accuracy of wall shear and velocity

Views: 2,104

Posted By santos

Even it is "low Re turbulence model", it is not...

Even it is "low Re turbulence model", it is not specific for a flow with low Re values, instead the difference to standard turbulence models is that it solves the fields up to the wall, without wall...

Forum: OpenFOAM Running, Solving & CFD

April 26, 2010, 09:32

Replies: 10

Accuracy of wall shear and velocity

Views: 2,104

Posted By santos

Hi, If you are using turbulence models that...

Hi,

If you are using turbulence models that make use of wall functions, you need to keep your y+ above 30. If you want more resolution, switch to a low Re turbulence model without wall functions,...

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