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Complete turbulence

  1. Jan 24, 2016 #1
    1. The problem statement, all variables and given/known data
    why the author gave that the complete turbulenece is indpendent on the Reynold number ?


    2. Relevant equations


    3. The attempt at a solution
    For the turbulence to occur , the Reynold number must be higher than certain value , am i right . So , IMO , turbulenet is dependent on the Reynold number
     

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  3. Jan 24, 2016 #2

    SteamKing

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    You're not correctly comprehending what this slide is saying.

    First, it's discussing the friction factor f as it's plotted on the Moody diagram:

    6837190_f520.jpg

    In the zone where the flow is completely turbulent, i.e. to the right of the dashed line, the friction factor is constant w.r.t. the Reynolds number. In this region, the friction factor f depends on the relative pipe roughness only.
     
  4. Jan 24, 2016 #3
    Can you explain this phenomenon?
     
  5. Jan 24, 2016 #4

    SteamKing

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  6. Jan 25, 2016 #5
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