Detect "Solution Complete" in Batch mode

hwerner2014 · November 15, 2021, 14:33

Hi all,
I'm working on some parameterized simulations in ANSYS Fluent and making good use of the output parameters, however there are a number of data files (e.g. wing surface static pressure as ASCII, Tecplot formatted field variables, etc...) that I would like to export once each case is complete.
The simulations are steady-state and terminate early if convergence conditions are met, so the "execute command every ____ iterations" option won't work for every case. Is there a Fluent command sequence that will detect when the simulation is 'complete' so I can then export the desired data automatically? I don't want to run the entire parameterized simulation in batch mode, I really just want some automatic exporting of data between cases (i.e. run ends, execute journal exporting the data, proceed to next case) without me babysitting.

LuckyTran · November 15, 2021, 17:39

Just put the commands that you would have used with the "execute command every ___ iterations" at the end of your journal file before the exit.

In other words, just make a journal file. In your journal file you should have

solve/iterate 10000000000
and then big block of commands for your data export
exit
eof

hwerner2014 · November 19, 2021, 14:41

Ah, that makes sense. No special commands since Fluent considers itself on the 'iterate' task until solution complete or max iterations is reached.

How then do I ask Fluent to run my journal when I'm running a parametric job? Do I need to run the entire parametric job as a batch job with one journal? Each output file must have a unique file name, ideally with the relevant parameter values for that simulation included in the file name. I've been trying to find actual, complete documentation for batch mode commands and there doesn't appear to be any official documentation, just limited examples. Maybe I'm not entering appropriate search criteria?

LuckyTran · November 19, 2021, 16:27

You mentioned you are not doing a parametric study in batch mode, so what are you doing? Why are you asking how to do this? Have you changed your mind?

If you are using the GUI and running a case and just want a macro to export the data then you can just include only those commands in the journal file. That is, you can omit the solve and exit parts that I wrote and put only the block for exporting data.

To run the journal file, go to file, read, journal.

Nearly everything you can do in the GUI has an equivalent TUI (text) command. Press enter/return key and all available TUI commands will be printed on the screen. The structure of the TUI commands is very similar to the structure that use in the GUI.

So try to do it once using the GUI so you know what the expected behavior is. Then press enter and replicate that action using text commands.

November 15, 2021, 14:33	Detect "Solution Complete" in Batch mode	#1
hwerner2014 New Member Harry W Join Date: Nov 2021 Posts: 3 Rep Power: 4	Hi all, I'm working on some parameterized simulations in ANSYS Fluent and making good use of the output parameters, however there are a number of data files (e.g. wing surface static pressure as ASCII, Tecplot formatted field variables, etc...) that I would like to export once each case is complete. The simulations are steady-state and terminate early if convergence conditions are met, so the "execute command every ____ iterations" option won't work for every case. Is there a Fluent command sequence that will detect when the simulation is 'complete' so I can then export the desired data automatically? I don't want to run the entire parameterized simulation in batch mode, I really just want some automatic exporting of data between cases (i.e. run ends, execute journal exporting the data, proceed to next case) without me babysitting.

November 15, 2021, 17:39		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,675 Rep Power: 66	Just put the commands that you would have used with the "execute command every ___ iterations" at the end of your journal file before the exit. In other words, just make a journal file. In your journal file you should have solve/iterate 10000000000 and then big block of commands for your data export exit eof hwerner2014 likes this.

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November 19, 2021, 14:41		#3
hwerner2014 New Member Harry W Join Date: Nov 2021 Posts: 3 Rep Power: 4	Ah, that makes sense. No special commands since Fluent considers itself on the 'iterate' task until solution complete or max iterations is reached. How then do I ask Fluent to run my journal when I'm running a parametric job? Do I need to run the entire parametric job as a batch job with one journal? Each output file must have a unique file name, ideally with the relevant parameter values for that simulation included in the file name. I've been trying to find actual, complete documentation for batch mode commands and there doesn't appear to be any official documentation, just limited examples. Maybe I'm not entering appropriate search criteria?

November 19, 2021, 16:27		#4
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,675 Rep Power: 66	You mentioned you are not doing a parametric study in batch mode, so what are you doing? Why are you asking how to do this? Have you changed your mind? If you are using the GUI and running a case and just want a macro to export the data then you can just include only those commands in the journal file. That is, you can omit the solve and exit parts that I wrote and put only the block for exporting data. To run the journal file, go to file, read, journal. Nearly everything you can do in the GUI has an equivalent TUI (text) command. Press enter/return key and all available TUI commands will be printed on the screen. The structure of the TUI commands is very similar to the structure that use in the GUI. So try to do it once using the GUI so you know what the expected behavior is. Then press enter and replicate that action using text commands.