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Turbulence intensity in fully devloped pipe flow - Reference

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Old   October 14, 2010, 06:58
Default Turbulence intensity in fully devloped pipe flow - Reference
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Dear Colleagues,
in the CFD-Wiki the following is statet for the turbulence intensity in fully developed pipe flow:

Fully developed pipe flow For fully developed pipe flow the turbulence intensity at the core can be estimated as:
Where is the Reynolds number based on the pipe hydraulic diameter .



Does someone have a reference (textbook, journal paper, conference paper) for this statement...
It would really help me to find out where it comes from...
THX
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