The equation f-0.5 = 4.07 loge (NRe √f)-0.6 is called the ____________?
Correct answer: B. Von-Karman equation
- A. Colebrook formula
- B. Von-Karman equation
- C. Fanning equation
- D. None of these
Explanation
With the usual notation interpreted as f⁻¹ᐟ² = 4.07 logₑ(NRe√f) − 0.6, this is the von Kármán relation for turbulent flow in smooth pipes. The Colebrook equation additionally includes relative roughness.
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