CFD Online Discussion Forums - Q:write value at each time step from actuator disc source term

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)

- OpenFOAM Running, Solving & CFD (https://www.cfd-online.com/Forums/openfoam-solving/)

- - Q:write value at each time step from actuator disc source term (https://www.cfd-online.com/Forums/openfoam-solving/240172-q-write-value-each-time-step-actuator-disc-source-term.html)

Q:write value at each time step from actuator disc source term

Hi,

I am running a simulation of a tidal turbine using an actuator disc. The actuator disc source term in openfoam is calculated using a variableScaling method defined in fvOptions

the thrust coefficient is calculated as

Code:

const scalar CtStar = Ct*sqr(magUref/magUdisk);

the source term is calculated as

Code:

    // Compute calibrated thrust/power (LSRMTK:Eq. 5)

    const scalar T = 0.5*rhoRef*diskArea_*magSqr(Udisk & diskDir_)*CtStar;

as shownhere

How can I write the value of CtStar for each timestep that is calculated?

I tried to use functionObjLib in control dict but CtStar is not defined in the list of

Code:

    testing

    {

        type writeRegisteredObject;

        functionObjectLibs ( "libIOFunctionObjects.so" );

        objectNames ("bananas");

        outputControl     outputTime;

    }

Thank you

Hello,

I was able to write the CtStar at every timestep. It was trivial!!!

I added a line to the fvOptions

Code:

writeToFile true;

and the result is given as a data file in postprocessing