In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?
Correct answer: B. 1.2 Vavg
- A. Vavg
- B. 1.2 Vavg
- C. 1.5 Vavg
- D. 1.8 Vavg
Explanation
The turbulent velocity profile is relatively flat compared with the parabolic laminar profile, so the centreline maximum is only about 1.2 times the average velocity. The exact ratio varies somewhat with Reynolds number, but 1.2 is the standard approximation used here.
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