ISRO Mechanical & Aerospace 2010 - Question 73

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The maximum thickness of boundary layer in a pipe of radius R is

  • A. 0.1R
  • B. 0.22R
  • C. 0.5R
  • D. R

Answer: D. R

Explanation: In fully developed pipe flow, the boundary layers from the walls merge at the centerline, so thickness is the radius R.

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