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Consider the following statements pertaining to boundary layer on solid surfaces:
1. The boundary layer separation takes place if the pressure gradient is zero.
Boundary layer on a flat plate is laminar if the Reynolds number is less than 5 × 105.
Which of the above statements is/are correct?
  • a)
    1, 2 and 3
  • b)
    1 and 2 only
  • c)
    2 and 3 only
  • d)
    1 and 3 only
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider the following statements pertaining to boundary layer on sol...
Boundary layer can only separate if there is an adverse pressure gradient in the flow direction, without a pressure gradient, the boundary layer will never separate, so 1 is wrong. For Boundary layer to separate, the fluid near the boundary will also have to come to rest, along with the fluid particles which are on the surface. Hence velocity gradient at the wall (y = 0) will be 0.
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Consider the following statements pertaining to boundary layer on solid surfaces:1. The boundary layer separation takes place if the pressure gradient is zero.Boundary layer on a flat plate is laminar if the Reynolds number is less than 5 × 105.Which of the above statements is/are correct?a) 1, 2 and 3b) 1 and 2 onlyc) 2 and 3 onlyd) 1 and 3 onlyCorrect answer is option 'C'. Can you explain this answer?
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