very basic question regarding fluid mechanics
Hi guys,
How can I find friction velocity if I know the bulk velocity. fluid is water. i am using a square duct configaration. i know only the bulk Reynolds number and fluid properties. please help me. praveen |
Re: very basic question regarding fluid mechanics
I seem to remember something of the form of Cmu^0.25 * sqrt (k) exists at a wall...
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Re: very basic question regarding fluid mechanics
friction velocity = sqrt( shear stress on wall/density )
You need to know the shear stress on the wall to calculate friction velocity. |
Re: very basic question regarding fluid mechanics
Is this a homework problem? Check out "A First Course in Turbulence" (Tennekes & Lumley) Chapter 5.2
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Re: very basic question regarding fluid mechanics
Praveen,
Thank you, but I believe I knew that. However the formula I gave you is used in CFD at the walls I believe. You could check T&L as Ken adviced. |
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