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What type of flow can be taken for granted in a pipe of a uniform cross-section?

(a) steady

(b) unsteady

(c) uniform

(d) non-uniform

I got this question in semester exam.

The question is from Types of Fluid Flow topic in chapter Kinematics of Flow and Ideal Flow of Fluid Mechanics

1 Answer

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Best answer
Right choice is (c) uniform

Explanation: According to the continuity equation, ρAV =constant, where ρ= density, A= cross-sectional area of flow, V = velocity of flow. For a pipe of a uniform cross-section, no matter what the rate of flow is, the velocity of flow inside the pipe will always remain constant. Hence, it’ll always be a uniform flow. It’ll be a steady flow if and only if the water level is maintained at a constant level by supplying water at the same rate as it gets discharged, else the water level will keep decreasing with time leading to an unsteady flow.

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