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Export cell residuals to .dat file

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Old   June 19, 2020, 04:55
Default Export cell residuals to .dat file
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Hello,

I know how to display cell residuals (/solve/set/expert) but I am running my cases on a cluster so I need data to be stored in a file to retrieve it when the case has finished running.

So is there a way to modify what is stored in the .dat file to also get the saved cell residuals ?

Currently I can see the cell residuals contour but I need to do at least one iteration on Fluent after the case ran on the cluster. Is there a way to get it immediately ? Of course I could do this 1 iteration everytime, but I wonder if there was a way to optimize it.

I read several threads about standard residuals export or cell residuals but I have not found any thread talking about the export of the cell residuals.

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Old   June 19, 2020, 06:50
Default Writing to Data File
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You can use DEFINE_RW_FILE to write (as well read) anything extra to case and data file. However, it all boils down to accessing what you want to write. Accessing cell residuals in a UDF may not be straightforward.

So, another approach could be to create CFF and UDM to save the cell residuals in UDM. Then UDMs are saved to data file automatically.
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Old   June 23, 2020, 11:25
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Quote:
Originally Posted by vinerm View Post
You can use DEFINE_RW_FILE to write (as well read) anything extra to case and data file. However, it all boils down to accessing what you want to write. Accessing cell residuals in a UDF may not be straightforward.

So, another approach could be to create CFF and UDM to save the cell residuals in UDM. Then UDMs are saved to data file automatically.
Hi Vinerm,


thanks for your suggestions.


The questions is why Fluent does not save the residual information in the .dat file if the case is run on the cluster. If the case is run locally Fluent manages to save the residuals in the .dat file.


Is there something wrong with the fluent command on the cluster?
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Old   June 23, 2020, 12:06
Default Cell Residuals
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If the cell residuals are saved in local machine, then those will also be saved on the cluster. Try saving cell residuals on local machine, then close Fluent session. Reload data file in new session and observe if it is still there without running one iteration. If it is there, then you can certainly do that in cluster as well. If not, then you know that those do not get stored.
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Old   July 1, 2020, 04:49
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Thank you,

you are right they don't get stored.
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