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Mr. Dubey • 100.64K Points
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Q. What can be the maximum diameter of the pipe for the water flow of velocity 1 m/s (ν = 10-6) to be laminar in nature? Assume Lower critical Reynolds number to be 2100.

  • (A) 2.1 mm
  • (B) 21 mm
  • (C) 21 cm
  • (D) 0.21 mm
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Explanation by: Mr. Dubey
if the reynolds number of the flow is below its lower critical reynolds number, the flow is clearly laminar. the maximum diameter can be found for re = 2100. the diameter comes out to be 2.1 mm.

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