I'm trying to add a damping term to the velocities in a given region.
Do someone know if it is possible to overwrite the defined velocity variables (u,v,w) used in the solver?
I would like to dissipate the velocity gradually by a damping function.
In CEL it was not possible to do something like u = if(x>=xstart,u*damping,u),
since u is already a defined variable.
Maybe a user routine can do this?
If you want to add some damping try a porous region with a small resistance. Alternately you can define a source term and do what ever you like - either damp it a little or specify the velocities or anything else you can dream up.
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