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-   -   saving transient data for 1 point & 1 variable (http://www.cfd-online.com/Forums/cfx/21918-saving-transient-data-1-point-1-variable.html)

REH December 7, 2005 15:24

saving transient data for 1 point & 1 variable
 
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?

Rui December 7, 2005 16:27

Re: saving transient data for 1 point & 1 variable
 
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

Mike December 7, 2005 16:35

Re: saving transient data for 1 point & 1 variable
 
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


TB December 8, 2005 03:19

Re: saving transient data for 1 point & 1 variable
 
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....


REH December 8, 2005 11:44

Re: saving transient data for 1 point & 1 variable
 
Thanks for all the help, I was able to export the data.

RH

nina2007 November 17, 2015 21:17

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 03:19

Make a monitor point at the location you want study?

Opaque November 18, 2015 10:47

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 17:09

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


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