saving transient data for 1 point & 1 variable

December 7, 2005, 14:24

I would like to save the velocity data for a single node over a series of time steps so that I can take a FFT and find the frequency of oscillation using CFX 10.0. Can anyone help me with this?

December 7, 2005, 15:27

In Post, create a Chart. On the Chart tab select Type = Time, on the Chart Line tab select the Location (a Point that you have to already had created) and select the Variable. You'll get a graphic with the Variable values at the time instants available in Post. You may export the data.

If you want to have the data at every timestep, in Pre create a Monitor Point.

Regards,

Rui

December 7, 2005, 15:35

You could also create a Monitor Point for Velocity at the point of interest. Pull up the plot for the monitor point history in the Solver Manager, right-click on the plot and select "Export Plot Data". This will allow you to export a csv (comma separated value) file that Excel can open up. Mike

December 8, 2005, 02:19

I'll create a monitor pt in post and export the data to a text file using command line in command window. I shouldn't be hard as post adopted PERL language.

Of course you can try Rui's method but I never like the way Post do the 2D graph....

December 8, 2005, 10:44

Thanks for all the help, I was able to export the data.

RH

nina2007 · November 17, 2015, 20:17

Hi
I would like to save the velocity data for a single node over a series of time steps so that I can take a FFT and find the frequency of oscillation using ansys16.1. Can anyone help me with this?
thanks

Lance · November 18, 2015, 02:19

Make a monitor point at the location you want study?

Opaque · November 18, 2015, 09:47

To complete Lance's answer, once you have created your monitor point, you should be able to visualize the transient values in the ANSYS CFX Solver Manager.

In addition, once the run is completed you can load your results file in CFD-Post, and create a chart of the same monitor point. See options for Charts.

Once the chart for your monitor point is created, you can also evaluate the FFT on that data series.

Good luck.

nina2007 · November 24, 2015, 16:09

Thank you very much ! I really appreciate it.
If I would like to save the velocity data for a line over a series of time steps. What can I put
instead of vertex average in the report type.
Can anyone help me with this?
Thanks

December 7, 2005, 14:24	saving transient data for 1 point & 1 variable	#1
REH Guest Posts: n/a	I would like to save the velocity data for a single node over a series of time steps so that I can take a FFT and find the frequency of oscillation using CFX 10.0. Can anyone help me with this?

December 7, 2005, 15:27	Re: saving transient data for 1 point & 1 variable	#2
Rui Guest Posts: n/a	In Post, create a Chart. On the Chart tab select Type = Time, on the Chart Line tab select the Location (a Point that you have to already had created) and select the Variable. You'll get a graphic with the Variable values at the time instants available in Post. You may export the data. If you want to have the data at every timestep, in Pre create a Monitor Point. Regards, Rui

December 7, 2005, 15:35	Re: saving transient data for 1 point & 1 variable	#3
Mike Guest Posts: n/a	You could also create a Monitor Point for Velocity at the point of interest. Pull up the plot for the monitor point history in the Solver Manager, right-click on the plot and select "Export Plot Data". This will allow you to export a csv (comma separated value) file that Excel can open up. Mike

December 8, 2005, 02:19	Re: saving transient data for 1 point & 1 variable	#4
TB Guest Posts: n/a	I'll create a monitor pt in post and export the data to a text file using command line in command window. I shouldn't be hard as post adopted PERL language. Of course you can try Rui's method but I never like the way Post do the 2D graph....

December 8, 2005, 10:44	Re: saving transient data for 1 point & 1 variable	#5
REH Guest Posts: n/a	Thanks for all the help, I was able to export the data. RH

November 17, 2015, 20:17		#6
nina2007 New Member Join Date: Jan 2015 Posts: 3 Rep Power: 11	Hi I would like to save the velocity data for a single node over a series of time steps so that I can take a FFT and find the frequency of oscillation using ansys16.1. Can anyone help me with this? thanks

November 18, 2015, 02:19		#7
Lance Senior Member Lance Join Date: Mar 2009 Posts: 669 Rep Power: 22	Make a monitor point at the location you want study?

November 18, 2015, 09:47		#8
Opaque Senior Member Join Date: Jun 2009 Posts: 1,803 Rep Power: 32	To complete Lance's answer, once you have created your monitor point, you should be able to visualize the transient values in the ANSYS CFX Solver Manager. In addition, once the run is completed you can load your results file in CFD-Post, and create a chart of the same monitor point. See options for Charts. Once the chart for your monitor point is created, you can also evaluate the FFT on that data series. Good luck.

November 24, 2015, 16:09		#9
nina2007 New Member Join Date: Jan 2015 Posts: 3 Rep Power: 11	Thank you very much ! I really appreciate it. If I would like to save the velocity data for a line over a series of time steps. What can I put instead of vertex average in the report type. Can anyone help me with this? Thanks

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