[vincent.clary]

Hello everybody,
We are running simulations imposing force source terms in order to model roughly tidal turbines with Actuator Disk method or equivalent.
We added the code in fvoptions, calling an external .h file Vectorcodedsource.h (that we created) because the code was too long to be implemented directly in fvoptions.
Everything is running well but we now would like to create an output variable for this force source term (that is a vector). Is there a way to program this directly in fvoptions? Or another method without modifying the solver?

Thank you a lot for your help. Here are the fvoptions file and .h files.
fvOptions.txt

myLongCode.H

[anuragm]

Originally Posted by vincent.clary

Hello everybody,
Everything is running well but we now would like to create an output variable for this force source term (that is a vector). Is there a way to program this directly in fvoptions? Or another method without modifying the solver?

You can try working with function objects in your controlDict. Here is a good documentation on how to implement and use this feature.

http://www.tfd.chalmers.se/~hani/kur...CFD_Report.pdf

You can create these objects either at runtime or after the simulation has completed using -postProcess flag

[vincent.clary]

Hello,
Thank you for your answer, I'm replying quite late!
Finally we solved the problem by creating a new field in fvOptions:

//creates object to be able to have the Termsource output in paraview
volVectorField Termsource
     (
     IOobject
     (
         "Termsource",
mesh_.time().timeName(),
                 mesh_,
                 IOobject::NO_READ,
                 IOobject::AUTO_WRITE
     ),
         mesh_,
         dimensionedVector
         (
                 "Uvec",
                 dimVelocity,
                 vector::zero
         )
     );

Then we implement Termsource in the code.

And to have the output only at selected output times:

if(mesh_.time().outputTime())
{
    Termsource.write();
}