CFX Reduce transient output file size

ThomasN · October 10, 2013, 03:51

Hello to everybody,

first: it's a great Forum, many thanks for the helpful advices!

I've a question concerning the CFX transient output files. On transient calculations and with the default settings the files become bigger over the time because every file saves the whole convergence history.
For example I start with my 2D model with a file size of 40MB and after 500 transient files it's 200MB.

Is it possible to switch that off? I only want to save my results.

Thanks

Thomas

ghorrocks · October 10, 2013, 06:05

You must be saving full results files. Make the transient results selected variables only and they will be much smaller - but you should save a full one every now and again to restart from if the run crashes.

ThomasN · October 10, 2013, 06:27

Oh, OK, that makes sense. If I select "selected variables" I can't restart from these Points right?

Another question: If my run crashes and I restart my calculation with the last transient file the solver produces a new Folder for the following result files. Is there a way to connect the files of the different folders in CFX Post?

ghorrocks · October 10, 2013, 06:34

That's right, unless you add enough variables such that it can restart from it.

If you are recovering from a crashed run you are going to have to do the post processing in two sections (if you are doing things in time).

ThomasN · October 10, 2013, 06:37

OK many thanks for your reply!

October 10, 2013, 03:51	CFX Reduce transient output file size	#1
ThomasN New Member Join Date: Oct 2013 Posts: 21 Rep Power: 13	Hello to everybody, first: it's a great Forum, many thanks for the helpful advices! I've a question concerning the CFX transient output files. On transient calculations and with the default settings the files become bigger over the time because every file saves the whole convergence history. For example I start with my 2D model with a file size of 40MB and after 500 transient files it's 200MB. Is it possible to switch that off? I only want to save my results. Thanks Thomas

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October 10, 2013, 06:05		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	You must be saving full results files. Make the transient results selected variables only and they will be much smaller - but you should save a full one every now and again to restart from if the run crashes.

October 10, 2013, 06:27		#3
ThomasN New Member Join Date: Oct 2013 Posts: 21 Rep Power: 13	Oh, OK, that makes sense. If I select "selected variables" I can't restart from these Points right? Another question: If my run crashes and I restart my calculation with the last transient file the solver produces a new Folder for the following result files. Is there a way to connect the files of the different folders in CFX Post?

October 10, 2013, 06:34		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	That's right, unless you add enough variables such that it can restart from it. If you are recovering from a crashed run you are going to have to do the post processing in two sections (if you are doing things in time).

October 10, 2013, 06:37		#5
ThomasN New Member Join Date: Oct 2013 Posts: 21 Rep Power: 13	OK many thanks for your reply!