# Pressure Drop in outlet Vent

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 October 28, 2008, 00:04 Pressure Drop in outlet Vent #1 Abdul Guest   Posts: n/a Dear Friends, If i use 1 for KL in the outlet vent boundary condition, which pressure i have to take for calculating the pressure drop across a duct. I given 1 in view that all the dynamic head will be lost. is this assumption right? can i take static pressure at outlet and total pressure at inlet for calculating the pressure drop? Thanks in Advance.

 October 28, 2008, 08:16 Re: Pressure Drop in outlet Vent #2 John S. Guest   Posts: n/a I think if you're assuming your duct exhausts into a farfield-like condition then a headloss of 1 would be reasonable (e.g. water through a pipe which dumps onto the ground).

 October 28, 2008, 12:13 Re: Pressure Drop in outlet Vent #3 Abdul Guest   Posts: n/a Yes john i am doing a similar case. In my case i am exhausting gas into atmosphere. Can i take static pressure at outlet and Total pressure at inlet for calculating pressure drop? Thanks in advance