[CLINT_E]

Hi all,

I am having difficulties in finding a way to write down a specific UDF for a boundary in VOF model and I hope someone could give an hint.

Let us consider a cube (phase 1): inlet, outlet and symmetry on all other faces. Now I introduce a second phase by udf on one of the symmetry faces, say a 2D ellipse.

I would like to "fix" the 2D second phase on its plane, say imposing a local no-slip condition only for the 2nd phase while keeping symmetry on the rest of the face. Any idea on how to do it?

Up to now, my ideas:

1. Use DEFINE_PROFILE on the face, no possibility to hook UDF to symmetry;
2. Substitute symmetry with wall, DEFINE_PROFILE to set zero shear outside the 2nd pahse -> no way;
3. Use DEFINE_ADJUST to set zero velocity to the 2nd phase only -> this would be called at each iteration (looks to me not worth) and not sure about the results.

Any suggestion would be greatly appreciated, cheers!