CFD Online Discussion Forums - How to export time series of variables for one point?

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How to export time series of variables for one point?

Hi dear all
I would like to have the time series of several variables for one or several points of the field domain after solving the case. It's not important for me to have outputs of all points of the domain in writeTime intervals.
Is there any option or tool, I can set this option or any option in paraView that I get time series of variables for one point?

Thanks
Best regards

Hi Mary,

Have you tried the sample utility? It can be used both as runTime and post-processing utility.

Kind regards,

Niels

Hi Niel,
I had a look at sampling section in user guide.
It says it writes the data in separate time files which is not my purpose. This way I have to look into every separate time step.
I want it to be written for a point in one single file.
Isn't there any other way?

Thanks
Best regards

Hi,

You can then either write your own utility or make a small post-processing tool, which concatenates the files from the outputted directories.

I am not aware of a utility, which outputs to a single file.

Kind regards,

Niels

Hi,

There is probeLocations utility which exports values of a fields over time at a given set of points in one file.

Hi
Thanks Alexander. I found the utility and tried to use it after running the case.
This is how ProbeDict looks like:

Code:

// Fields to be probed. runTime modifiable!

fields

(

    pd

);



// Locations to be probed. runTime modifiable!

probeLocations

(

    (-0.375 -0.5 -0.01)

);

but after running command: "probeLocations" it writes the text blow without giving any variable for non of the time steps:

Code:

Create time



Create mesh for time = 0



Time = 0



Time = 0.02



Time = 0.04



Time = 0.06



Time = 0.08



Time = 0.1



Time = 0.12



Time = 0.14



Time = 0.16



Time = 0.18



Time = 0.2



Time = 0.22



Time = 0.24



Time = 0.26



Time = 0.28



Time = 0.3



Time = 0.32



Time = 0.34



Time = 0.4



Time = 0.6



Time = 0.8



Time = 1



Time = 1.2



Time = 1.4



Time = 1.6



Time = 1.8



Time = 2



Time = 2.2



Time = 2.4



Time = 2.6



Time = 2.8



Time = 3



Time = 3.2



Time = 3.4



Time = 3.6



Time = 3.8



Time = 4



Time = 4.2



Time = 4.4



Time = 4.6



Time = 4.8



Time = 5



Time = 5.2



Time = 5.4



Time = 5.6



Time = 5.8



Time = 6



End

Am I doing anything wrong?

Thanks

Hi,

Probed values are in postProcessing/probes/<time>/<variable name> files.

In your case I guess time will be 0 (as you simulation starts at 0) and variable name will be pd.

Yes that was written in Probe folder:)
thanks so much...

can't recognize the probesDict while using 'postProcess -func probes'

Dear all,

I am trying to command 'probeLocations' to plot some variables along time series, but the system complains that

PHP Code:


		
			
probeLocations has been superceded by the postProcess utility:

    postProcess -func probes

or

    postProcess -func 'probes(p, U)'

Therefore, I tried to command 'postProcess -func probes' in order to get the probes at several specific locations. However, the result is not exactly what I expected, it was totally a different story, plotting p and U at a (0,0,0) location(seems to plot these out by default). It seems like the probesDict in the system isn't recognized while commanding the'postProcess -func probes'.

Afterwhile, I was trying to command 'postProcess -func 'probes(U, I_overall)'. It gives me the desired field but, again, at the default location(0,0,0) instead of the location that I settled in the probesDict.

Could any one please tells me how to specify the location while command in the terminal? Or explains the reason for failing to recognize the probesDict?

Best,
Linyan