[Aina]

Dear all, currently I'm doing a 3D simulation using kOmegaSST. I need to save in every timestep the velocity field instead of all variable fields (k, omega, p, nut, etc.). It is possible?
I can't see in controlDict any option to do this.

Thanks a lot!

[clapointe]

I'm not sure how to do it without modifying the code (maybe someone can jump in here). But but to get you an answer this can be done by incorporating some small changes to e.g., pimpleFoam :

First, copy the solver and rename it to something like myPimpleFoam (make sure to update Make/files as well and have it compile to $FOAM_USER_APPBIN). Then, instead of

runTime.write()

in the run loop we can use something like

//see if it is time to write data
if (runTime.writeTime())
{
    //only write U
    U.write();
}

Caelan

[Aina]

It works exactly as you said

Thank you!
Aina

[fedez91]

Unless you want to make a cool video, I don't know why you would want to do that. If you need to postprocess every time-step it may be better to do it during the run-time and avoid saving lots of files that will occupy a lot of space in your hard-drive.