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Dimensions on Dimensionless Wall Distance (y+)

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Old   July 6, 2011, 07:45
Default Dimensions on Dimensionless Wall Distance (y+)
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Hopefully a quick question:

I am writing some scripts to back out some nice y+/u+ plots. I think I have a pretty good understanding of what y+ is, why it's important, so on and so forth.

My question is how I should handle the units on the friction velocity term. I realize that the y+ term should be analagous to Reynolds number (length * velocity / viscosity). However, the common treatment of the friction velocity is:
u* = \sqrt{ \frac{\tau_w}{\rho} }

edit: Just realized that I'm simply missing a g_c.

Last edited by minger; July 7, 2011 at 11:23.
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