+1 vote
in Fluid Mechanics by (118k points)
With the decrease in the viscosity, Reynolds number ________

(a) Increases

(b) Decreases

(c) Same

(d) Independent

The question was asked in a national level competition.

Origin of the question is Drag on a Sphere in portion Boundary Layer Flow & Forces on Sub-merged Bodies of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
Correct option is (a) Increases

Explanation: With the decrease in viscosity, Reynolds number increases. Reynolds number below 2000 is laminar flow and Reynolds number above 2000 is for turbulent flow. Thus, the correct option is Increases.

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