Monitoring/writing a single parameter from UDF.

nvarma · August 31, 2018, 10:33

Hi,
what is the best way to write an output parameter (calculated in a udf) as a monitor? It is not a variable like temperature or pressure that has to be stored at each cell location. Just something similar to global maxima of temperature (not the same). So using c_udmi seems inefficient.

What would be the best way?

blackmask · August 31, 2018, 11:20

You can store them in file-scope or static variables.

nvarma · August 31, 2018, 11:21

Can you also tell me how to access this (to plot or monitor) from the fluent GUI? I am not sure I understand.

blackmask · August 31, 2018, 11:33

You can output the necessary information to a file and you can process it later. Is a real-time visualization of such information critical for your application?

nvarma · August 31, 2018, 11:36

Quote:

Originally Posted by blackmask

You can output the necessary information to a file and you can process it later. Is a real-time visualization of such information critical for your application?

Okay. I can use Gnuplot or something to plot it real time. Was wondering if fluent had a "more direct" way to do that.

Yes, real time plotting would help me tune the relaxation factors in the UDF quickly.

AlexanderZ · September 2, 2018, 22:52

you may write variable value to output console using Message macro

best regards

August 31, 2018, 10:33	Monitoring/writing a single parameter from UDF.	#1
nvarma Senior Member nm Join Date: Mar 2013 Posts: 100 Rep Power: 13	Hi, what is the best way to write an output parameter (calculated in a udf) as a monitor? It is not a variable like temperature or pressure that has to be stored at each cell location. Just something similar to global maxima of temperature (not the same). So using c_udmi seems inefficient. What would be the best way?

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August 31, 2018, 11:20		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 22	You can store them in file-scope or static variables.

August 31, 2018, 11:21		#3
nvarma Senior Member nm Join Date: Mar 2013 Posts: 100 Rep Power: 13	Can you also tell me how to access this (to plot or monitor) from the fluent GUI? I am not sure I understand.

August 31, 2018, 11:33		#4
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 22	You can output the necessary information to a file and you can process it later. Is a real-time visualization of such information critical for your application?

September 2, 2018, 22:52		#6
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	you may write variable value to output console using Message macro best regards