The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the _____________ equation?
Correct answer: A. Nikuradse
- A. Nikuradse
- B. Von-Karman
- C. Blasius
- D. Colebrook
Explanation
The stated smooth-pipe turbulent-flow correlation is commonly identified as the Nikuradse equation. The Colebrook equation differs by including a relative roughness term, while Blasius is a simpler power-law correlation.
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