Reference Pressure in CFX Junction Box Routines

Silmaril · September 3, 2013, 09:51

Hi,

I wonder if there is a way to get the Reference Pressure value within a Junction Box (JCB) Routine.

I cannot use the USER_GETVAR function (only for CEL, and I don't know if it works either). Moreover, while trying the USER_GET_GVAR function (available in JCB) the "pref" or "Reference Pressure" are not recognized as an admissible value for the variable input...

Any suggestions on this?

Thanks in advance

Lorenzo

singer1812 · September 3, 2013, 09:57

Dont know your answer offhand, but I am wondering why you need to do that?

Use an expression to set your reference pressure, and reference that.

Silmaril · September 3, 2013, 10:43

I have to couple CFX with a 1D thermal hydraulic code, the CFX input should be the most generic (since should be used even from users other than me). So I need to get the assigned Reference Pressure Value in the most generic way...

In the meanwhile, I tried to caluclate it as the difference between average Absolute and Relative Pressures in some part of the computational domain, and it works relatively well. However I still prefer a quicker and more elegant solution, if possible.

September 3, 2013, 09:51	Reference Pressure in CFX Junction Box Routines	#1
Silmaril New Member Join Date: Oct 2010 Posts: 29 Rep Power: 16	Hi, I wonder if there is a way to get the Reference Pressure value within a Junction Box (JCB) Routine. I cannot use the USER_GETVAR function (only for CEL, and I don't know if it works either). Moreover, while trying the USER_GET_GVAR function (available in JCB) the "pref" or "Reference Pressure" are not recognized as an admissible value for the variable input... Any suggestions on this? Thanks in advance Lorenzo

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September 3, 2013, 09:57		#2
singer1812 Senior Member Edmund Singer P.E. Join Date: Aug 2010 Location: Minneapolis, MN Posts: 511 Rep Power: 21	Dont know your answer offhand, but I am wondering why you need to do that? Use an expression to set your reference pressure, and reference that.

September 3, 2013, 10:43		#3
Silmaril New Member Join Date: Oct 2010 Posts: 29 Rep Power: 16	I have to couple CFX with a 1D thermal hydraulic code, the CFX input should be the most generic (since should be used even from users other than me). So I need to get the assigned Reference Pressure Value in the most generic way... In the meanwhile, I tried to caluclate it as the difference between average Absolute and Relative Pressures in some part of the computational domain, and it works relatively well. However I still prefer a quicker and more elegant solution, if possible.