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Theoretical vs Experimental Equations?

  1. Nov 16, 2014 #1
    Hi. I am calculating the pressure loss through straight pipes and pressure loss through pipe fittings. I need to compare the theoretical value with to the actual experimental values. But the thing is, do I use the Darcy equation for both calculations or are there separate equations to calculate these pressure losses?
  2. jcsd
  3. Nov 18, 2014 #2
    The equations are the same, but the friction factors for straight pipes can be found in Moody diagrams whereas the friction factor for fittings are usually given as a constant for the specific geometry, see e.g. Cengel and Turner, Lienhard&Lienhard or other standard engineering textbooks.
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