[hhu_xpc]

Hi Foamers,
How to add a time-dependent velocity function to meanVelocityForce to drive fluid motion?
Something like this，This below is what I set in fvoptions, this is wrong but this is what I want to say, does anyone have any good suggestions? Thanks a lot!

momentumSource
{
type meanVelocityForce;
active yes;
selectionMode all;
fields (U);
Ubar ((cos(2*pi/(12*3600)*time())+1) 0 0 );
}