Pressure loss through a small Annulus
Pressure loss through a small Annulus
(OP)
I'm looking for an equation governing the loss in pressure through an annulus of .0005in in a nitrogen medium. Can anyone give me a hand?
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Pressure loss through a small Annulus
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RE: Pressure loss through a small Annulus
RE: Pressure loss through a small Annulus
RE: Pressure loss through a small Annulus
Patricia Lougheed
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RE: Pressure loss through a small Annulus
Patricia Lougheed
******
Please see FAQ731-376: Eng-Tips.com Forum Policies: Eng-Tips.com Forum Policies for tips on how to make the best use of the Eng-Tips Forums.
RE: Pressure loss through a small Annulus
See FAQ378-1142: Flow in Annular Space The "petroleum method" in the FAQ has worked very well for me in the past (i.e., calculated pressure drop is very close to measured pressure drop) on bigger annular spaces, but on your scale you have a whole range of microscopic effects that I'm not sure an equivalent diameter calculation will do you much good. On your scale I'd be worried about the boundary layers of the two pipes interfering with each other.
Good luck.
David
RE: Pressure loss through a small Annulus
I also found the same reference in 'Hydraulic and Pneumatic Power and Control' by Franklin Yeaple, 1966.
Ted