Changing Pressure-inlet to Wall for Inlet valve (from UDF and Scheme)

esco_rep · March 28, 2017, 20:42

Hi All,

I'm simulating a simple 'valve bc' to allow a tube to purge after exhausting its high pressure gas. I have used a execute on demand UDF and scheme file which allows the switch between a wall and a pressure inlet once the pressure inside the tube gets below a desired pressure.

When i run the simulation I get a segmentation fault the iteration after the wall switches to pressure inlet. When i call the files/macros manually I have npo issue and it runs fine. Likewise if i continue to run the case after the fault it works as desired.

I am a little stumped as to why, so if someone can shed some light i would appreciate it!

peace

esco_rep · March 28, 2017, 22:21

Solving my own question...make sure the updates are set to the same interval as you call the udf/scheme. Always love a simple answer.lol

sarodesr · December 7, 2024, 06:35

Hi, I am trying to simulate same problem, can you please share your UDF and Scheme or walk me through how to do that. I am complete new to UDF.
Thanks in advance.

March 28, 2017, 20:42	Changing Pressure-inlet to Wall for Inlet valve (from UDF and Scheme)	#1
esco_rep New Member steve Join Date: Feb 2015 Posts: 4 Rep Power: 11	Hi All, I'm simulating a simple 'valve bc' to allow a tube to purge after exhausting its high pressure gas. I have used a execute on demand UDF and scheme file which allows the switch between a wall and a pressure inlet once the pressure inside the tube gets below a desired pressure. When i run the simulation I get a segmentation fault the iteration after the wall switches to pressure inlet. When i call the files/macros manually I have npo issue and it runs fine. Likewise if i continue to run the case after the fault it works as desired. I am a little stumped as to why, so if someone can shed some light i would appreciate it! peace

March 28, 2017, 22:21		#2
esco_rep New Member steve Join Date: Feb 2015 Posts: 4 Rep Power: 11	Solving my own question...make sure the updates are set to the same interval as you call the udf/scheme. Always love a simple answer.lol chaitanyaarige likes this.

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December 7, 2024, 06:35		#3
sarodesr New Member Sarang Join Date: Jul 2013 Posts: 13 Rep Power: 13	Hi, I am trying to simulate same problem, can you please share your UDF and Scheme or walk me through how to do that. I am complete new to UDF. Thanks in advance.