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Forum: Main CFD Forum

November 27, 2022, 08:57

Replies: 8

Good estimates for the friction velocity?

Views: 761

Posted By FMDenaro

The scaling (1/7) is from the polynomial...

The scaling (1/7) is from the polynomial assumption of the mean steady velocity. In the viscous sub-layer you have u+=y+ -> du+/dy+=1 then you can estimate du/dy|wall

Forum: Main CFD Forum

November 27, 2022, 06:51

Replies: 8

Good estimates for the friction velocity?

Views: 761

Posted By FMDenaro

As you wrote, the friction velocity will be a...

As you wrote, the friction velocity will be a result of the solution, thus you have to solve, compute, evaluate your y+ and if it is large refine the grid and solve again.
In a channel flow you can...

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