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Homework Help: Question on Equivalent/Hydraulic Diameter

  1. Aug 3, 2011 #1
    1. The problem statement, all variables and given/known data
    Hello, I have a question on how to calculate the equivalent/hydraulic diameter for a problem that I'm doing.

    The problem states that I should use the cross-sectional flow area shown with an equivalent diameter based upon a closed rectangle (entire perimeter)

    [PLAIN]http://img196.imageshack.us/img196/3968/finsm.jpg [Broken]

    2. Relevant equations

    D_h = 4*A_x-section/P_wetted

    3. The attempt at a solution

    So I did:

    A_xsection = 6cm * 1cm = 6cm^2
    Since there are three slits, I multiplied that by 3 to get: 18cm^2

    The perimeter was 6+6+1+1 = 14cm
    I also multiplied this by 3 to get: 42cm

    D_h = 4*(18cm^2)/42cm = 1.714 cm = 0.01714 m

    Is this right?
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Aug 3, 2011 #2
    Looks OK to me.
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