First slide

Fluid dynamics

Question

Water flows through two identical tubes A and B.A volume V₀ of water passes through the tube A and 2V₀ through B in a given time. Which of the following may be correct?
   a) Flow in both the tubes are steady
   b) Flow in both the tubes are turbulent
   c) Flow is steady in A but turbulent in B
   d) Flow is steady in B but turbulent in A

Moderate

A

b and c are correct
B

a, b and c are correct
C

a, c and d are correct
D

all are correct

Solution

Velocity of water in B is two times the velocity of water in A . So flow in both the tubes may be steady or turbulent .
Also flow in A may be steady while that in B may be turbulent ( as velocity in B is more than that in A ).
But if the flow in B is steady , flow in B can never be turbulent as velocity in A is less than that in B..

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