udf for additional pressure loss coeffizient in pipes (zeta value)

claudia.h · March 4, 2013, 10:19

Hello,

i tried to simulate a closed system with natural cirulation. The geometry is shown in the attached picture. The simulation works and now i am trying to inclued a additional pressure loss coeffizient (zeta-value) between the absorber (red) and the cooler (blue) in order to reproduce reality better.
Does anybody know if (and how) there is a possibillity to include an additional pressure loss coefficient as a UDF instead of redrawing the geometry for each value of pressure loss coeffizient. Thanks!

claudia.h · March 11, 2013, 06:28

Does anybody have an idea how to solve this?

rambex001 · March 14, 2013, 10:58

Hi Claudia,
did you solved the problem because I have a similar problem?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
UDF for pressure at outlet	mireis	FLUENT	1	October 1, 2018 13:55
Pressure modification using flux at outlet boundary (udf)	UnclePetors	Fluent UDF and Scheme Programming	1	January 1, 2013 10:47
Pressure profile UDF for unsteady-state problem?	Mohsen Keshavarzian	FLUENT	2	August 20, 2008 05:22
what the result is negatif pressure at inlet	chong chee nan	FLUENT	0	December 29, 2001 06:13
Fluent 5.2, UDF and Pressure BC's	Alfonso Ferrandez	FLUENT	0	May 4, 2000 08:02

March 11, 2013, 06:28		#2
claudia.h New Member Claudia Hintringer Join Date: May 2010 Posts: 10 Rep Power: 16	Does anybody have an idea how to solve this?

March 14, 2013, 10:58		#3
rambex001 New Member Join Date: Jan 2010 Location: Innsbruck, Austria Posts: 4 Rep Power: 16	Hi Claudia, did you solved the problem because I have a similar problem?