For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is
A. constant
B. dependent only on Reynolds number
C. a function of Reynolds number and relative roughness
D. dependent on relative roughness only
Answer:B
For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is
A. constant B. dependent only on Reynolds number C. a function of Reynolds number and relative roughness D. dependent on relative roughness only