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Reynolds Number of a circular plate perpendicular to external flow

  1. May 7, 2009 #1
    Hello, I am trying to obtain how to find the Reynolds Number of a circular plate perpendicular to external flow. Thanks
  2. jcsd
  3. May 9, 2009 #2

    Andy Resnick

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  4. May 9, 2009 #3


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    The problem is what is the "length" of a flat perpendicular plate?
  5. May 9, 2009 #4
    The diameter of the cylinder is 3 inches. The length of the tube is approximately 3 feet. The set of equations that I am using say that there is an equation for a flat plate in a external perpendicular flow. I have found equations for flat plates with the external flow parallel to the plate's length as represented in the wiki-site and different school notes. However, I have yet to obtain an equation for a flat plate with a flow perpendicular to the diameter.
    The problem is diagrammed below... (This flow is not a pipe. Completely filled volume)
    --> ______________ __
    --> /\ ....................\ |
    --> | |.................... | Diameter
    --> \/_____________/ _|_
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