Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time't'. α = a co-efficient to be experimentally determined) ?
Correct answer: A. ε = ε0 + α.t
- A. ε = ε0 + α.t
- B. ε = ε0 + α.t2
- C. ε = ε0 + α.t3
- D. ε = ε0 + α.t4
Explanation
Colebrook and White represented surface deterioration as a linear increase in roughness with time, so ε equals the initial roughness plus αt. The coefficient α accounts for the experimentally observed rate of roughness growth.
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