Uniform flow occurs when

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SSC JE ME Previous Paper 17 ( Held on: 24 Jan 2018 Morning)
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  1. the flow is steady
  2. the flow is streamline
  3. size and shape of the cross section in a particular length remain constant
  4. size and cross section change uniformly along length

Answer (Detailed Solution Below)

Option 3 : size and shape of the cross section in a particular length remain constant
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Explanation:

  • The flow of a fluid in which each particle moves along its line of flow with constant speed and in which the cross-section of each stream tube remains unchanged is known as Uniform flow.
  • A flow in which the velocity of the fluid at a particular fixed point does not change with time is called steady flow.
  • In streamline flow the fluid flow can be represented by a streamline pattern defined within an Eulerian description of the flow field. These streamlines are drawn such that, at any instant in time, the tangent to the streamline at any one point in space is aligned with the instantaneous velocity vector at that point.
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