The necessary condition for the flow to be steady is that

Explanation:

Uniform flow is defined as the type of flow in which the velocity at any given time does not change with respect to space.

Non-Uniform Flow is defined as the type of flow in which the velocity at any given time changes with respect to space.

Non-uniform Flow: When the fluid properties change with respect to space, the type of flow is known as Non - uniform flow.

Steady Flow: When the fluid properties do not change with respect to time, then the flow is known as steady flow.

Unsteady flow: When the fluid properties change with respect to time, then the flow is known as unsteady flow.

Rotational flow: When the fluid particles rotate about their center of mass, then the flow is known as rotational flow.

• The flow of liquid through a long pipe of constant diameter at a constant rate is a steady uniform flow
• The flow of liquid through a long pipeline of constant diameter, at either increasing or decreasing rate, is unsteady – uniform flow
• The flow of liquid through a tapering pipe at a constant rate is a steady non – uniform flow

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• The flow through a tapering pipe at either increasing or decreasing rate is unsteady – non – uniform flow.