Pipe Flow Calculations Forum

Its great, I got it. but let me ask one more question if you don't mind, Is the used expansion factor in this calculator also like perry's one? I mean if that is, why haven't you mention it in the theory page? ( http://www.pipeflowcalculations.com/pipeflowtheory/flow_through_nozzles_and_orifices.htm...

I appreciate you for the info. that's very helpful. Yes ,ISO 5165-4 has introduced the same equation (the second equation that I've mentioned from Perry) for venturi expansion factor and also you are right about the validity range (in fact, that was a real fatal mistake from me! and a real relevant ...

I have two questions that I would appreciate if any one help me to find their answers. let's start. The discharge coefficient used for venturi in the calculator is: Cd=a+b.(Ln Re)^2+c.(Ln Re)^3 and apparently the expansion factor used for it, is: Buckingham Eq: Y=1-(0.41-0.35*beta^4).(p1-p2)/(k.p1) ...