Fluid Mechanics - GATE practice papers - Mechanical for Q. 369
Q. Which among the following sentences are true for turbulent flow
(1) The frictional resistance is proportional to the square of the velocity
(2) The frictional resistance is independent of the pressure
(3) The frictional resistance is proportional to the density of fluid
(4) The frictional resistance slightly varies with temperature (Marks: 02)- Published on 19 Oct 15a. sentences (1), (2) and (3) are correct
b. sentences (2), (3) and (4) are correct
c. sentences (1), (2) and (4) are correct
d. all the sentences are correct
ANSWER: all the sentences are correct
The laws of friction for turbulent flow states that, the frictional resistance is proportional to the square of the velocity, the frictional resistance is independent of the pressure, the frictional resistance is proportional to the density of fluid and the frictional resistance slightly varies with temperature
