Easy way to export monitor data from CFX out file

ghorrocks · October 23, 2013, 08:06

Rather than a true line you can do this with a long thin solid region, then use the volumeInt() function. That will work just fine, but you will need to generate a mesh with the long thin mesh region in it.

Lilienthal · October 23, 2013, 08:12

Thanks for your advice.
I believe the solid region would have an influence on the flow? Otherwise I should give this a try.

ghorrocks · October 23, 2013, 08:20

No, I did not say a solid region. I recommend a mesh region which is made contiguous with the rest of the mesh, and will be included in the fluid domain. It will have no affect on the flow. It is just putting a label on a mesh volume so you can calculate some values on it.

Lilienthal · October 23, 2013, 08:30

Actually you said solid region

But lets not get stupid here. I think I get what you mean. So I'll define a mesh volume consisting of a line of cells in the grid generator and use that as a monitoring region in cfx. Thanks a lot!

ghorrocks · October 23, 2013, 17:13

I did, didn't I... I meant a solid region of mesh (which you define as part of the fluid domain), not a domain which you define as a solid. I did not state that very clearly at all.

But I think you get the idea. Give it a go and it should work.

vijayadityah · January 15, 2018, 05:08

hello all,

I am running an optimization process using a steady state setting. I created a plane to monitor the mass flow through it. I want to export the data of the last few (30) iterations of the run, however I do not want to manually export the data for each run (as there are 100 runs in the optimization). Is there a possible way where I can automatically export the results?

ghorrocks · January 15, 2018, 16:31

Use the command line tools. I think the command line you are look for is "cfx5mondata" or something like that.

vijayadityah · January 15, 2018, 16:44

Hi Glenn,

Thanks for the reply. I have looked into it. However, I am running on RSM and a cluster. As there are more than 100 jobs it would be helpful if it is possible to automatically export the data.

ghorrocks · January 15, 2018, 16:57

If you want to do it automatically without thinking then use the parametric capabilities in ANSYS workbench. But it will be hard to get the last 20 iteration worth of values out in Workbench, it is easy to get it to automatically give results from the final iteration.

If you want the last 20 iteration worth of results I would do it using the command line as I suggested. If you have a large number of simulations then you can script it in a batch file (windows) or shell script (linux).

vijayadityah · January 15, 2018, 17:20

Quote:

Originally Posted by ghorrocks

If you want the last 20 iteration worth of results I would do it using the command line as I suggested. If you have a large number of simulations then you can script it in a batch file (windows) or shell script (linux).

There is an option in CFX-Pre (using ANSYS 18.2) where I can mention the last number of iterations that I need to monitor different values (avg, std.dev). Now that I think of it, is there any way that I can make the monitor point values as an output parameter?

ghorrocks · January 15, 2018, 17:51

Yes, you just set them as a parameter and it will be visible in workbench. Have a look at the workbench tutorials for how to do this. This is not the CFX tutorials, workbench has its own tutorials on the use of parameters.

January 15, 2018, 05:08	monitor data from iterative runs	#26
vijayadityah New Member Join Date: Dec 2016 Posts: 11 Rep Power: 9	hello all, I am running an optimization process using a steady state setting. I created a plane to monitor the mass flow through it. I want to export the data of the last few (30) iterations of the run, however I do not want to manually export the data for each run (as there are 100 runs in the optimization). Is there a possible way where I can automatically export the results?

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October 23, 2013, 08:06		#21
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Rather than a true line you can do this with a long thin solid region, then use the volumeInt() function. That will work just fine, but you will need to generate a mesh with the long thin mesh region in it.

October 23, 2013, 08:12		#22
Lilienthal New Member Paul Join Date: Oct 2013 Posts: 4 Rep Power: 12	Thanks for your advice. I believe the solid region would have an influence on the flow? Otherwise I should give this a try.

October 23, 2013, 08:20		#23
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	No, I did not say a solid region. I recommend a mesh region which is made contiguous with the rest of the mesh, and will be included in the fluid domain. It will have no affect on the flow. It is just putting a label on a mesh volume so you can calculate some values on it.

October 23, 2013, 08:30		#24
Lilienthal New Member Paul Join Date: Oct 2013 Posts: 4 Rep Power: 12	Actually you said solid region But lets not get stupid here. I think I get what you mean. So I'll define a mesh volume consisting of a line of cells in the grid generator and use that as a monitoring region in cfx. Thanks a lot!

October 23, 2013, 17:13		#25
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	I did, didn't I... I meant a solid region of mesh (which you define as part of the fluid domain), not a domain which you define as a solid. I did not state that very clearly at all. But I think you get the idea. Give it a go and it should work.

January 15, 2018, 16:31		#27
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Use the command line tools. I think the command line you are look for is "cfx5mondata" or something like that.

January 15, 2018, 16:44		#28
vijayadityah New Member Join Date: Dec 2016 Posts: 11 Rep Power: 9	Hi Glenn, Thanks for the reply. I have looked into it. However, I am running on RSM and a cluster. As there are more than 100 jobs it would be helpful if it is possible to automatically export the data.

January 15, 2018, 16:57		#29
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	If you want to do it automatically without thinking then use the parametric capabilities in ANSYS workbench. But it will be hard to get the last 20 iteration worth of values out in Workbench, it is easy to get it to automatically give results from the final iteration. If you want the last 20 iteration worth of results I would do it using the command line as I suggested. If you have a large number of simulations then you can script it in a batch file (windows) or shell script (linux).

January 15, 2018, 17:51		#31
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Yes, you just set them as a parameter and it will be visible in workbench. Have a look at the workbench tutorials for how to do this. This is not the CFX tutorials, workbench has its own tutorials on the use of parameters.