[Jack001]

Hi all,

I have the need to compute the Reynolds stresses (R) from a steady RANS simulation but in the rotating frame of reference of the results from a MRFSimpleFoam calculation. The post processing utility will calculate R but it is using the absolute velocity whereas I want to use the relative velocity. Can someone give me a suggestion on how to do this? At the moment the R utility does this:

volSymmTensorField R
        (
            IOobject
            (
                "R",
                runTime.timeName(),
                mesh,
                IOobject::NO_READ,
                IOobject::AUTO_WRITE
            ),
            RASModel->R()
        );
        R.write();

and pulls the stresses from the RASModel object, but I have no idea how I could make this refer to the rotating reference frame!

Edit:

I am thinking it might be easier to just compute the Reynolds stress in the rotating frame directly from the default Reynolds stresses using an appropriate transformation matrix.