The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge) ?
Correct answer: B. x0.8
- A. x1.5
- B. x0.8
- C. x-1.5
- D. x-0.8
Explanation
For a turbulent boundary layer on a smooth flat plate with zero pressure gradient, the empirical thickness relation is approximately δ proportional to x^0.8. The laminar relation is proportional to x^0.5, so x^0.8 distinguishes turbulent growth.
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