Define Boundary conditions

raghulvr · October 15, 2015, 04:10

Hi guys,
Ibam analysing the flow-pressure characteristic of pressure control valve in CFX.
My question is how to define both
1.Static pressure
2.mass flow rate of fluid within one boundary itself(i.e inlet)
I tried to add both these input parameters within one boundary itselfitself.but option available do not facilitate this to be entered in one field.
Total pressure(static) and mass flow areare available as two separate options.
Can you help me out!
Thanks in Advance!!!

ghorrocks · October 18, 2015, 20:44

I should write an FAQ on this....

You cannot have a boundary with both velocity and pressure specified.

So, specify the pressure at the inlet and the flow rate (velocity) at the outlet. The flow rate at the outlet is the same as the inlet for a steady state flow.

October 15, 2015, 04:10	Define Boundary conditions	#1
raghulvr Member Rahul Join Date: Sep 2015 Posts: 39 Rep Power: 11	Hi guys, Ibam analysing the flow-pressure characteristic of pressure control valve in CFX. My question is how to define both 1.Static pressure 2.mass flow rate of fluid within one boundary itself(i.e inlet) I tried to add both these input parameters within one boundary itselfitself.but option available do not facilitate this to be entered in one field. Total pressure(static) and mass flow areare available as two separate options. Can you help me out! Thanks in Advance!!!

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October 18, 2015, 20:44		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	I should write an FAQ on this.... You cannot have a boundary with both velocity and pressure specified. So, specify the pressure at the inlet and the flow rate (velocity) at the outlet. The flow rate at the outlet is the same as the inlet for a steady state flow.