[tmr2044]

Hello,

As stated in the title, the function postProcess -func sampleDict is not returning any data. This has only happened once I repurposed my sampleDict to sample values on an arbitrary plane; when I ran the same function for a sampleDict sampling along an arbitrary line, a postProcessing directory was returned containing all the data. My sampleDict file is below:

FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      sampleDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
surfaceFormat raw;
interpolationScheme cell;
sets();
surfaces
(
    constantPlane
    {
        type              plane;    // always triangulated
        basePoint       (0.05 0.05 0.3);
        normalVector  (0 0 1);
    }
);
fields
(
    Uz
);

Thank you in advance for any help.

[tmr2044]

I found the solution to my own problem:

Sampling is not a function that has been 'superceded' (OF error's words) by calling sampleDict using postProcess, which was why I used the command

postProcess -func sampleDict

because of this, I had to include in my sampleDict the following (per OF error's instructions):

type    sets;
libs    ("libsampling.so");

*I did have this in my original sampleDict (just got lost amongst comments when I was copying pasting onto my post), which was why the command I used worked when I sampled along a line*

SOLUTION:

change

type    sets;

to

type    surfaces;

and voila! It works! Hope this helps someone!

[scrubber]

Hello.

I have a similar problem running "postProcess -func sampleDict". No folder named "postProcessing" is created.

It seems like it is reading the my velocity field "U.air".
See my sampleDict below. Any help, is much appreciated.






____________________________

Time = 1

Reading fields:
volVectorFields: U.air


Executing functionObjects

End
__________________________


My sampleDict:




// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //


setFormat raw;

surfaceFormat vtk;


{
ensight
{
format ascii;
}
}


interpolationScheme cellPoint;

// Fields to sample.
fields
(
U.air
);



type sets;
libs ("libsampling.so");

sets
(
BFS_xH_2
{
type midPointAndFace;// lineCellFace;//
axis distance;
start (0.0534 0.0000 0.0000);
end (0.0534 0.0667 0.0000);
}
BFS_xH_5
{
type lineCellFace;//midPointAndFace;
axis distance;
start (0.1335 0.0000 0.0000);
end (0.1335 0.0667 0.0000);
}
BFS_xH_7
{
type lineCellFace;//midPointAndFace;
axis distance;
start (0.1869 0.0000 0.0000);
end (0.1869 0.0667 0.0000);
}
BFS_xH_9
{
type lineCellFace;//midPointAndFace;
axis distance;
start (0.2403 0.0000 0.0000);
end (0.2403 0.0667 0.0000);
}
BFS_xH_12
{
type lineCellFace;//midPointAndFace;
axis distance;
start (0.3204 0.0000 0.0000);
end (0.3204 0.0667 0.0000);
}
BFS_xH_14
{
type lineCellFace;//midPointAndFace;
axis distance;
start (0.3738 0.0000 0.0000);
end (0.3738 0.0667 0.0000);
}
);



surfaces
(
);


// ************************************************** ********************* //

[tmr2044]

Hello Scrubber,

Does OF give you any errors when you try and run sampleDict?

[scrubber]

Hello Tmr2044.

If I try to just run the command simpleDict, OF give this error
jens@jens-VirtualBox:~/OpenFOAM/jens-6/run/test_case/BFS/DPMFoam_2WC$ simpleDict
simpleDict: command not found

I get no error from OF when running "postProcess -func sampleDict", but no postProcessing folder is created.

[DevinS]

Thank you guys!

By adding

type sets;
libs ("libsampling.so");


to my sampleDict, and use "postProcess -func sampleDict -latestTime" command. It finally succeed to sample!

[Da Lord's]

Hi everyone,


I had the same challenge as Trent, followed the fixes suggested on this page, but the postprocessing folder was still not created. I used the command "postProcess -func sampleDict -latestTime" as suggested by DevinS, but no output folder was created. Attached is my sampleDict.


Any help is well appreciated in advance.


Thanks.

FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    object      sampleDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
surfaceFormat raw;

interpolationScheme cell;
type    sets;
type    surfaces;

libs    ("libsampling.so");

surfaces
(
    constantPlane
    {
    type            constantPlane;
        planeType       pointAndNormal;    // always triangulated
        basePoint       (-126 0 110);
        normalVector  (0 0 1);
    }
);
fields
(
    U
);

[Da Lord's]

I later found my way around it. I changed the type from "constantPlane" to "cuttingPlane". Nonetheless, the data is repetitive at many locations, I could not easily plot it in matlab. I also took the data from the same plane in paraview and the data writes the same way.


Formerly, surface data was always written according to the point file. It seems so many things are changed now.


I have seen a similar thread, where a user provided an octave code to sort the rows of the data but the code is not working for me.


I will appreciate if there is a way to directly generate the points data result from openfoam.


Thanks again anticipation.