For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance) ?
Correct answer: A. V/Vmax = (x/r)1/7
- A. V/Vmax = (x/r)1/7
- B. V/Vmax = (r/x)1/7
- C. V/Vmax = (x.r)1/7
- D. None of these
Explanation
The one-seventh power law gives V/Vmax = (x/r)^(1/7) when x is the distance from the pipe wall and r is the pipe radius. The velocity is zero at the wall and reaches its maximum at the centreline, matching this form.
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