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Fluid flow problem with the momentum balance equation

  1. Sep 20, 2012 #1
    All problem info, and my work is done in the attached pdf.

    Basically, I'm not sure that I have done it correctly.

    Attached Files:

  2. jcsd
  3. Sep 21, 2012 #2
    What is the formula for the area of a circle in terms of diameter?
  4. Sep 21, 2012 #3

    So the answer is then:

    Fp = -[itex]\rho[/itex]vj2[itex]\frac{\pi}{4}[/itex](D12 - D22)
  5. Sep 21, 2012 #4
    Looks good to me.
  6. Sep 21, 2012 #5

    rude man

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    Comment: interesting problem; case where change in momentum is vΔm instead of the usual mΔv.
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