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Energy equation and continuity equation mismatch

  1. Jul 1, 2015 #1
    A pipe is discharging from H=100m to an open atmosphere. The available discharge at inlet is 0.4m3/s

    1. The bernauli's equation tells v=sqrt(2*g*H), neglecting any losses in the pipe, v=~44m/s
    2. continuity equation tells v=Q/A, say diameter of pipe=0.3m, v=~5.65m/s

    which is correct?
  2. jcsd
  3. Jul 2, 2015 #2


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    Staff: Mentor

    Are you saying the open end of the pipe is 100m above ground?

    Which do you think is correct and why?
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