1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A Can someone help calculate pressure drop ?

  1. May 29, 2017 #1
    I am a non technical innovator trying to develop a new product. Can someone help me calculate pressure drop and flowrate across a cylinder packed with uniform spheres of 10mm diameter.

    I found this online but unable to calculate: https://neutrium.net/fluid_flow/pressure-drop-through-a-packed-bed/

    Fluid: Air
    Required flowrate: 500 CFM
    Inlet Pressure: 4 to 12 inches water column
    Outlet Pressure: Atmosphere
    Cylinder size: 12 inch diameter
    Cylinder height: 12 inches
    Packed Spheres diameter: 10mm (attached is a reference of how the media is packed)

    What should be the required inlet pressure to achieve a flow rate of 500 CFM ?
    What will be the flow rate of inlet pressure is 4 inches water column ?

    Earliest help/assistance appreciated. Thank you

    Attached Files:

  2. jcsd
  3. May 29, 2017 #2


    User Avatar
    Science Advisor
    Homework Helper
    2017 Award

  4. May 29, 2017 #3
    Bed voidage and friction factor is confusing me
  5. May 29, 2017 #4


    User Avatar
    Science Advisor
    Homework Helper
    2017 Award

    Bed voidage is around 0.26 (stacking spheres ) and the friction factor is what comes out (you'll note that it does not occur in the equation in section 5) .
    5.1 is just a matter of rewriting the same thing
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted