d2dt2 on a patch
 

Hi Foamers,

is there a way to get the second time derivative on a patch? I would like to calculate the second time derivative for the temperature. So far, I know how to calculate the second time derivative for the whole field with fvm::d2dt2. But I get a fvMatrix and I don't know how to continue with that.

Thanks in advance.

solved
 

I found out the answer myself. I only need to use fvc::d2dt2 instead of fvm::d2dt2 and then I will get a volScalarField from which I can take the boundary values.