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Old   July 27, 2001, 08:02
Default velocity profiles
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Hi there, can anyone suggest the most accurate equation for a turbulent velocity profile in a pipe? I know standard fluid mechanics texts have them, but they are a bit too general. I want to compare the velocity profiles I am getting with my commercial code with the analytical approach. Thanks!
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Old   July 27, 2001, 10:55
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Do you mean instantaneous profile or time-averaged?
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Old   July 28, 2001, 08:31
Default Re: velocity profiles
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There are several choices depending on the references. Some people use: (u/u0)=(y/delta)^(1/7) and you get the displacement thickness: delta*=delta/8
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Old   July 28, 2001, 12:41
Default Re: velocity profiles
John C. Chien
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(1). Schlichting's book,"boundary layer theory" has a chapter on "turbulent flow through pipes" which includes various formula for velocity profile, with test data.
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