masse source at the interface in VOF model

Marco

Hello, I need a precision on a UDF.

I want to know how the mass source work in UDF for a VOF model with 2 or 3 phase.

I want to create a DEFINE_SOURCE function that caracterise the deposition of mass (kg/m3-s) as a mass source within a volume near the free surface. I'm in unsteady problem.

(the masse source of one should be defined at the interface which change its shape)

any body know how ..?

thanks