Perforated plate

mehdimoradi. · November 13, 2017, 04:38

Hi
in Fluent guide in porous media part an example has been bought that :
"Consider a perforated plate which has 25% area open to flow. The pressure drop through the plate is known to be 0.5 times the dynamic head in the plate"
my question is: How "0.5" (bold part) was obtained? in other words how we can to obtain this coefficient for different porosity (for example 20% or 10%...)?
Thanks

Jeggi · November 14, 2017, 11:36

The most typical approach is to use some empirical correlation. Idelchick is a common source of information and you can find a snippet for thin-walled perforated plates here: https://www.design1st.com/Design-Res...atedPlates.pdf .

November 13, 2017, 04:38	Perforated plate	#1
mehdimoradi. Member mehdimoradi Join Date: Jun 2013 Posts: 53 Rep Power: 12	Hi in Fluent guide in porous media part an example has been bought that : "Consider a perforated plate which has 25% area open to flow. The pressure drop through the plate is known to be 0.5 times the dynamic head in the plate" my question is: How "0.5" (bold part) was obtained? in other words how we can to obtain this coefficient for different porosity (for example 20% or 10%...)? Thanks

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November 14, 2017, 11:36		#2
Jeggi Member Jógvan Join Date: Feb 2014 Posts: 31 Rep Power: 12	The most typical approach is to use some empirical correlation. Idelchick is a common source of information and you can find a snippet for thin-walled perforated plates here: https://www.design1st.com/Design-Res...atedPlates.pdf .