First slide
Fluid dynamics
Question

The flow of a fluid in a tube, laminar or turbulent, is determined by

(a) The velocity of the fluid

(b) Radius of the tube

(c) The density of the fluid

(d) The coefficient of viscosity of the fluid 

Moderate
Solution

Type of flow (laminar or turbulent) depends upon the reynolds number Re, where Re=ρvdη

Hence option-4 is correct.

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