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Why does friction factor decrease with Reynolds number?

  1. Mar 8, 2016 #1
    As the flow rate increases frictional force increases but friction factor(Darcy,Fanning) decreases with Re. Can anyone explain what is the concept behind it?
     
  2. jcsd
  3. Mar 10, 2016 #2
    You can have a look here (click it):smile:
     
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