[finn_amann]

Hello friends!

Does anyone know if it is possible to automatically stop a running simulation if the time step reaches a specified lower bound? E.g. when dt gets as low as 1e-7 s, I'd like for the simulation to stop. This way, I could save valuable computation time on my cluster, since in my case, something must have gone very wrong, if the time step is that small.

Best regards

Finn

[Yann]

Hello Finn,

If you are using the OpenCFD branch (openfoam.com) you should be able to do it using the runTimeControl function object: https://doc.openfoam.com/2306/tools/...unTimeControl/

The minTimeStep condition looks like it does what you are looking for.

Regards,
Yann

[finn_amann]

Exactly what I needed, thanks so much Yann

Best regards

[panda007]

Hi finn_amann,

Have you figured out how to use the minTimeStep condition? I'm trying to use it for my case, but I couldn't figure out the input format in the controlDict and it doesn't seem to be anywhere from openfoam documents. Would it be possible to share your inputs for this function if you have successfully used it before? Thanks!

[panda007]

Thanks Finn_amann to give me this code for how to use minTimeStep function inside the controlDict, I have tested it, and it worked very good for me to stop the simulation once the deltaT value drops below the threshold. I put it here in case anyone else needs.

functions
{
    runTimeControl1
    {
        type            runTimeControl;
        libs            (utilityFunctionObjects);
        conditions
        {
            condition0
            {
                type            minTimeStep;
                minValue               1e-6;
            }
        }
    }
}