writing execFlowFunctionObjects
 

how can write the results of execFlowFunctionObjects in postProcessing folder instead of terminal only?

(At least with OpenFOAM 2.2.x) the results are written in the postProcessing folder (additionally to the terminal window). Do you just want to get rid of the terminal output? Then you can redirect the output to /dev/null, e.g.

Hi Joachim
I want to execFlowFunctionObjects write values in all time steps as I've set in controlDict,now it writes only for latest time,I use this command:
how can have all times in postProcessing folders?

Just remove the -time option. Then all time steps are written in one file (per variable) in the directory whose name is the time of the first time step.

I want to values after 0.005598 be written in folders,but I'll test it,thanks.
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I deleted that option but still only latest time value is written in each file and replaces to previous value instead of be written below it.only one value(for latest time) is shown in the list.

Which version of OpenFOAM do you use?

Here is part of my controlDict:
I use the simpleFunctionObbjects swak4Foam library to calculate average values at different boundaries, but you should also be able to do this like described here without swak4Foam.

then its because of outputTime,can't use it instead of timeStep?:( this way information become very much higher written in folders.
it's one of dictionaries:

I think outputControl outputTime can only be used during the actual run of the solver not in post processing.

Greetings to all!

@Ehsan: Please post the main settings for "controlDict" or email me the whole "controlDict" file.

But I'm guessing that you have the "startFrom" option set to "latestTime".

Best regards,
Bruno

Hi Bruno
I changed it to startTime but still each time step that is calculated is over written on previous value and replaces it.

Hi Ehsan,

What you have is this:

1. You attached the file "n3_Average/0.0149299/faceSource.dat", which only has the time sample "0.005639". This is very strange, since the time "0.0149299" comes way after the "0.005639".
2. Your start time is set to "0.005598" and the end time to "0.00746495999". Neither one match the example case you provided.

So, I did some tests with the "cavity" test case I did the other day for "execFunctionObjects". And the conclusions were as follows:

1. The "startTime" value in the "controlDict" only affects the folder to which the function objects will save the data to. For example:
   • The cavity case runs from 0 to 0.5, in steps of 0.1.
   • After running icoFoam, I set the start time to 0.4 and ran the execFunctionObjects utility.
   • The result was that it created the file "postProcessing/movingWall/0.4/faceSource.dat" and placed inside it all of the averages, from 0 to 0.5 in steps of 0.1.
2. In other words, this utility uses the "startTime" as a timing reference, but it will use the "-time" or "-latestTime" options as the real definitions of the time folders to be used.

Therefore, Ehsan, what you have to do is:

1. Define in "controlDict" the "startTime" for which you want to save the data. For example, if "startTime" is set to "0.005598", then for example, the data will be saved at "postProcessing/n3_Average/0.005598/faceSource.dat".
2. Then, if you want to re-calculate all of these values from "0.005598" till the end of the simulation, then run with the respective option, something like this:
   
   Code:

   ---

   execFlowFunctionObjects -time 0.005598:

   ---

Best regards,
Bruno

Bruno I used this but like before it only writes one time step

Ooops... sorry, I've been using OpenFOAM 2.2.x. There have been two major bugs fixed in "execFlowFunctionObjects".

Let me think... OK, let's see if this works for you and do one line at a time:
You should now have a perfectly working execFlowFunctionObjects utility. Try using it. Hopefully it will now work as intended.

You mean these?
https://github.com/OpenFOAM/OpenFOAM...ctionObjects.C

Thaaaaaaaaaanks dear Bruno,now it works fine. :)

Hi Joachim,
Problem is that Github enforces HTTPS and this doesn't work very well for people located at Iran... which is why I gave specific instructions for one of the git mirrors that exist for OpenFOAM 2.2.x, where this specific one doesn't require HTTPS to work.

Best regards,
Bruno

it was good if funkyDoCalc can be used for writing in folders after run,but its not possible yet as discussed in another thread.
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I noticed now that even Swak4Foam postProcessing dictionaries have worked with execFlowFunctionObjects!
its very good but how?is it implemented in execFlowFunctionObjects to be compatible by Swak functions?

Hi
I wanted to plot the case now but some fields (p,T,h) are constant in different times.:confused::(
its part of the result shown in terminal:
see red lines as instance.

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how can download patches from github?

Hi Ehsan,

I didn't mention execFlowFunctionObjects back then, because I had never managed to use it successfully in the past.


This is because the latest execFlowFunctionObjects from OpenFOAM 2.2.x works properly. Or at least it should.

Have you tried using the "-noFlow" option, as Joachim had mentioned in post #2?
Because this seems to be a symptom of not being able to load the fields for the current iteration, for which the "-noFlow" option should be able to do a better job with.

What patches?
The steps on post #13 already give you the latest code for execFlowFunctionObjects.

Best regards,
Bruno

I used -noFlow but didn't take effect:
I tjought may the patches in github be different.