Fluid flow through an orifice

  • Thread starter Fred Evans
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Main Question or Discussion Point

hello all,

i need to calculate the size of an orifice that will pass a certain volume of a viscous fluid

per time of say 10 seconds

pressure and viscosity are the variable values.

the application is in the design of a valve for dispensing accurate amounts of
a liquid of a given viscosity. (the liquid is polyurethane prepolymer which is a sticky
fluid of which the viscosity is always known but varies from batch to batch)

the viscosity changes with temperature

Can anyone please suggest a formula ?

Best regards

fred evans

( this is my first post-- and I see i can attach 5 tags-- what is a tag?
 

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