[gabitinho]

Hi all,
My problema is concerned about the sampling of data during the runtime.
I'll try to explain myself pretty clear.

I can create a sampleDict for my puntual sensors; for example:

sets
(
   GaugesP
   {
        type patchCloud;
        axis xyz;
        patches 1(wall5);
        points ((1 10 15));
        maxDistance 100;
   }
)

Or i can add in my controlDict some lines to do the same but in the runtime; for example:

probes
{
   tyoe  probes;
   functionObjectLibs ("libsampling.so");
   enabled true;
   outputControl timeStep;
   outputInterval 1;
}

fields
(
   U
);

probeLocations
(
   (1 10 15)
);

And here is my problem; I can create a sampleDict for my line sensors; for example:

sets
(
   GaugesL
   {
       type uniform;
       axis xyz;
       start (0.5 0.001 0);
       end (0.5 0.001 1); 
       nPoints 101;
   }
);

but I DO NOT KNOW how to do the same thing in the runtime; i have tried many expressions in the controlDict but i was not able to do it.

Can anyone help me?

Thanks a lot for your time,
g.

[niklas]

Do you mean something like this?
just add this to your controlDict

functions
{

    probes
    {
	functionObjectLibs ( "libutilityFunctionObjects.so" );
        type probes;
	probeLocations
	(
	   ( 0 0 0.4265111 )
	   ( 0 0 0.5284111 )
	   ( 0 0 0.7316111 )
	);
	fields ( p T );
    }
}

[gabitinho]

Hi Niklas,
Thanks for your response;

I understand that the code that you wrote it is used for "point gauges" (x,y,z coordinates are needed)...

... BUT I need a code to be placed in the controlDict for "line gauges": starts from one point (Xi,Yi,Zi) and ends in another point (Xe,Ye,Ze), like free-surface gauges that are used in laboratory along a line.

g.

[gschaider]

Originally Posted by gabitinho

Hi Niklas,
Thanks for your response;

I understand that the code that you wrote it is used for "point gauges" (x,y,z coordinates are needed)...

... BUT I need a code to be placed in the controlDict for "line gauges": starts from one point (Xi,Yi,Zi) and ends in another point (Xe,Ye,Ze), like free-surface gauges that are used in laboratory along a line.

g.

What is wrong with the "sets"-functionObject?

[gabitinho]

What is wrong with the "sets"-functionObject?

There is nothing wrong with it, but I must do it once the simulation has finished.
That's why I am trying to add some lines to my controlDict so I can obtain the info from my sensors in the run-time.

g.

[gschaider]

Originally Posted by gabitinho

There is nothing wrong with it, but I must do it once the simulation has finished.
That's why I am trying to add some lines to my controlDict so I can obtain the info from my sensors in the run-time.

g.

I said FUNCTIONOBJECT. That is executed at runtime

[gabitinho]

Hi gschaider,
I think that I am not explaining my self clearly enough, sorry for that...

I said FUNCTIONOBJECT. That is executed at runtime

Yes, that is the point;
I want to do it as a FUNCTIONOBJECT (that is executed at runtime), but I do not know to write the proper lines.

so, how do I define the start-point and the end-point of the line-segment?

I can NOT use

start (0.5 0.001 0);        
end (0.5 0.001 1);

g.

[niklas]

    line
    {
        type            sets;
        functionObjectLibs ("libsampling.so");
        enabled         true;
        outputControl   timeStep;
        outputInterval  1;

	interpolationScheme cellPoint;
	setFormat       raw;
	sets
	(
	    line1
            {

	      type uniform;
	      axis distance;
	      start ( 0 0 0 );
	      end   ( 1 0 0 );
	      nPoints 10;
	    }
	);
        fields
        (
            p
        );
    }

[gschaider]

Originally Posted by gabitinho

Hi gschaider,
I think that I am not explaining my self clearly enough, sorry for that...

Yes, that is the point;
I want to do it as a FUNCTIONOBJECT (that is executed at runtime), but I do not know to write the proper lines.

so, how do I define the start-point and the end-point of the line-segment?

I can NOT use

start (0.5 0.001 0);        
end (0.5 0.001 1);

g.

Well. You can. Niklas showed you in the other post. That function-object uses exactly the same back-end as the samples/set-utility so I'd have thought your problem is only that you didn't know THAT the functionObject exists. Was wrong

[gautami]

Originally Posted by niklas

    line
    {
        type            sets;
        functionObjectLibs ("libsampling.so");
        enabled         true;
        outputControl   timeStep;
        outputInterval  1;

    interpolationScheme cellPoint;
    setFormat       raw;
    sets
    (
        line1
            {

          type uniform;
          axis distance;
          start ( 0 0 0 );
          end   ( 1 0 0 );
          nPoints 10;
        }
    );
        fields
        (
            p
        );
    }

Dear Mr Nordin,

I am trying to use "sets-line" in the controlDict file exactly as you have posted in this thread.

I end up getting the following error.

/opt/OpenFOAM-2.2.0/bin/tools/RunFunctions: line 42: 18418 Segmentation fault $APP_RUN "$@" > log.$APP_NAME 2>&1

This is how my controlDict file looks: (After maxDeltaT)

functions
{   
    //probes
    //{ 
    // type            probes;
    // functionObjectLibs ("libsampling.so");
    //   // outputControl   outputTime;
    //    probeLocations
    //    ( 
    //        ( 1 0 1 )
    //        ( 1 0 1.5 )
    //    );
    //    fields
    //    ( 
    //        p
    //    );
   // }
    line 
    {   
        type            sets;
        functionObjectLibs ("libsampling.so");
        enabled         true;
        outputControl   timeStep;
        outputInterval  1;
        interpolationScheme cellPoint;
        setFormat       raw;
        sets
        (
            line1
            {

              type uniform;
              axis distance;
              start ( 0 0 0 );
              end   ( 0 0 1.5 );
              nPoints 10;
            }
        );
       fields
        (
            U
        );  
    }   
}

When I use "probes" I do not get any such errors and I find the porbes data in the postprocessing folder.

Kinldy can you please help me on this issue.

Kindly can you please let me know how could I use "sets-somePoints-cloud" option in controDict (for runtime data) where the points coordinates are to be read from a data file.

Your guidance is highly appreciated.Thank you.

Regards,
Gautami.