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Hydraulics help

  1. May 17, 2005 #1

    Clausius2

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    Is there some reason for Hazen-Williams friction model to failure in a hydraulic circuit?.

    I have simulated an hydraulic system in a commercial code, and this model is the unique which gives stupid results like infinite volumetric rates. The Reynolds is about 10^5.
     
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  3. May 17, 2005 #2

    FredGarvin

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    My reference as well as the web site here (http://www.piping-toolbox.com/6_797.html) show that you are right on the edge of [tex]R_e[/tex] for using Hazen-Williams. Also, are you possibly outside the realm of this:
    I guess after we discount those two notions, the model will have to go under the microscope. Is there any way to compare your model to Darcy?
     
    Last edited: May 17, 2005
  4. May 18, 2005 #3

    Clausius2

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    It doesn't help too much, but thanx anyway .

    The problem is I have to switch between friction models when calculating an hydraulic installation, but this model is the unique which spends the longer computational time and gives unbelievable results. I was searching for same sort of conditions in which this formula is applicable, but I haven't found nothing interesting for justifying this fact.
     
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