how to export all time steps' data

alubacyj · June 26, 2016, 10:15

Hello everyone,
I simulate 2-dimension flow passing a cylinder where appears the karman vortex. As known to all it's an unsteady and transient case,and I get data of 50 time steps. Now I want to export those velocity field data of 50 time steps, the problem is everytime I use the command <file—export> I can just export the data of one time step.
My question is how can I export those 50 time step data by simple operation?Need I export them one after another?

Thank you very much!

YuguiYo · June 27, 2016, 07:34

Hi Yujia,

When you choose the trn file in the setup, you have to choose the to export each time step. It's in setup -> solver -> output control -> trn results -> (add a file) -> Option -> every time step.
Then when you're in cfx post you can export all the time step.

Hope it helps,

Bye

monkey1 · June 27, 2016, 10:18

You want to export your Data from CFX Post to e.g. a.csv File for excel (this can be done by using a perl script have a look at http://www.cfd-online.com/Forums/cfx...tml#post385850)?
Is this your question?

Or is what YuguiYo said already the solution to your problem, meaning you want to have a trn file for each time step written, so that you can watch all of them in CFX Post?

alubacyj · June 28, 2016, 06:16

Thank you for your reply.
I know how to export data from cfx-pre, and now I want to export e.g. a couple pf csv files from CFX POST.

alubacyj · June 28, 2016, 06:17

Quote:

Originally Posted by YuguiYo

Hi Yujia,

When you choose the trn file in the setup, you have to choose the to export each time step. It's in setup -> solver -> output control -> trn results -> (add a file) -> Option -> every time step.
Then when you're in cfx post you can export all the time step.

Hope it helps,

Bye

Thank you for your reply.
I know how to export data from cfx-pre, and now I want to export e.g. a couple pf csv files from CFX POST.

alubacyj · June 28, 2016, 06:19

Quote:

Originally Posted by monkey1

You want to export your Data from CFX Post to e.g. a.csv File for excel (this can be done by using a perl script have a look at http://www.cfd-online.com/Forums/cfx...tml#post385850)?
Is this your question?

Or is what YuguiYo said already the solution to your problem, meaning you want to have a trn file for each time step written, so that you can watch all of them in CFX Post?

You are right, I want to export data from CFX-Post

-Maxim- · June 28, 2016, 06:19

in case you haven't set monitor points before your run, the approach with a script as monkey1 described in his linked post is recommended

alubacyj · June 28, 2016, 06:22

Quote:

Originally Posted by monkey1

You want to export your Data from CFX Post to e.g. a.csv File for excel (this can be done by using a perl script have a look at http://www.cfd-online.com/Forums/cfx...tml#post385850)?
Is this your question?

Or is what YuguiYo said already the solution to your problem, meaning you want to have a trn file for each time step written, so that you can watch all of them in CFX Post?

Thank you very much.
I know how to export a single csv file, and now I want to export all 100 time steps' csv files. Would you know how to do it with simple operation?

-Maxim- · June 28, 2016, 06:23

Quote:

Originally Posted by alubacyj

Thank you very much.
I know how to export a single csv file, and now I want to export all 100 time steps' csv files. Would you know how to do it with simple operation?

just read the linked post.

urosgrivc · June 28, 2016, 06:33

What are you going to do with all that data?
Is it not posible for you to make an expression in cfxpost?-> that would calculate what you want, than plot a transient graph of your expresion than export your time dependant solution.

In other words to calculate something you are probably trying to do with excel (or other) directly with ansys post and export only results that you realy need.
I doubt that thousants upon thousants of numbers is usefull to any human being.

schmarf · June 22, 2023, 08:42

how does this work in fluent. Are Report files the best solution? I d like to export Pressurevalues over my mesh for each timestep.

ghorrocks · June 22, 2023, 19:18

If you want to export the pressure over the entire mesh for each time step I would use CFD-Post and do it in a session file. You can record a session file doing the actions you want (load time step, export pressure, load next time step etc), then edit the session file to do it for all your time steps. Replay the session file and there you go.

June 26, 2016, 10:15	how to export all time steps' data	#1
alubacyj New Member Yujia Chen Join Date: Apr 2016 Posts: 11 Rep Power: 10	Hello everyone, I simulate 2-dimension flow passing a cylinder where appears the karman vortex. As known to all it's an unsteady and transient case,and I get data of 50 time steps. Now I want to export those velocity field data of 50 time steps, the problem is everytime I use the command <file—export> I can just export the data of one time step. My question is how can I export those 50 time step data by simple operation?Need I export them one after another? Thank you very much!

June 28, 2016, 06:33		#10
urosgrivc Senior Member urosgrivc Join Date: Dec 2015 Location: Slovenija Posts: 365 Rep Power: 11	What are you going to do with all that data? Is it not posible for you to make an expression in cfxpost?-> that would calculate what you want, than plot a transient graph of your expresion than export your time dependant solution. In other words to calculate something you are probably trying to do with excel (or other) directly with ansys post and export only results that you realy need. I doubt that thousants upon thousants of numbers is usefull to any human being. YuguiYo likes this.

June 22, 2023, 19:18		#12
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,854 Rep Power: 144	If you want to export the pressure over the entire mesh for each time step I would use CFD-Post and do it in a session file. You can record a session file doing the actions you want (load time step, export pressure, load next time step etc), then edit the session file to do it for all your time steps. Replay the session file and there you go. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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June 27, 2016, 07:34		#2
YuguiYo New Member Hugo Regina Join Date: Apr 2016 Posts: 23 Rep Power: 10	Hi Yujia, When you choose the trn file in the setup, you have to choose the to export each time step. It's in setup -> solver -> output control -> trn results -> (add a file) -> Option -> every time step. Then when you're in cfx post you can export all the time step. Hope it helps, Bye

June 27, 2016, 10:18		#3
monkey1 Senior Member Join Date: Jul 2011 Location: Berlin, Germany Posts: 173 Rep Power: 15	You want to export your Data from CFX Post to e.g. a.csv File for excel (this can be done by using a perl script have a look at http://www.cfd-online.com/Forums/cfx...tml#post385850)? Is this your question? Or is what YuguiYo said already the solution to your problem, meaning you want to have a trn file for each time step written, so that you can watch all of them in CFX Post?

June 28, 2016, 06:16		#4
alubacyj New Member Yujia Chen Join Date: Apr 2016 Posts: 11 Rep Power: 10	Thank you for your reply. I know how to export data from cfx-pre, and now I want to export e.g. a couple pf csv files from CFX POST.

June 28, 2016, 06:19		#7
-Maxim- Senior Member Maxim Join Date: Aug 2015 Location: Germany Posts: 413 Rep Power: 13	in case you haven't set monitor points before your run, the approach with a script as monkey1 described in his linked post is recommended

June 22, 2023, 08:42		#11
schmarf New Member mar Join Date: May 2023 Posts: 2 Rep Power: 0	how does this work in fluent. Are Report files the best solution? I d like to export Pressurevalues over my mesh for each timestep.