Isothermal turbulent flow of a fluid results in decrease of its pressure, which depends on the______________?
Correct answer: C. Both A. & B.
- A. Wall roughness
- B. Reynolds number
- C. Both A. & B.
- D. Neither A. nor B.
Explanation
For turbulent flow, frictional pressure loss depends on both Reynolds number and wall roughness through the friction factor. Ignoring either can give an incorrect pressure-drop estimate.
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