The formula for Thick-Edge Orifice

[pratamahrs1990]

Hi all,

I have some problem in my research about the thick-edge orifice formula. I can't find the influence of orifice length to the discharge.
I have found an online calculator for it but I can't find the formula derivation. Anybody can help me? Anybody have recommended literature?

The website for the online-calculator:
http://www.pressure-drop.com/Online-Calculator/

 

[JBA]

I recommend you Google "orifice thickness to diameter ratio" where you will find some sources that address your subject