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Product Viscosity vs. Shear

Vertical Tank Selection

Low Flow in Pipes- posted in Ankur's blog

Started by calgary, May 04 2013 12:13 AM

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Brand New Member

Posted 04 May 2013 - 12:13 AM

F_F has the definition of the ratio of pressure at vena contracta (Pvc) to vapor pressure.

Could anybody explain how F_F can be calculated using following expression?

F_F=0.96-0.28*sqrt(Pv/Pc)

I don't know how Pc is related to this matter.

Thanks.

Brand New Member

Posted 04 May 2013 - 12:14 AM

Sorry, i should say this topic is about control valve sizing. FF is used to calculate maximum flow rate through a control valve.

Gold Member

Posted 04 May 2013 - 05:53 AM

Calgary,

consider this resource ,it should help

breizh

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