When using the multiphase VOF method along with the built in evaporation-condensation lee model, is there a way to implement exactly what is being done in the built in model but with a UDF. The only portion of this built-in model I need to change are the evaporation and condensation frequencies which I would like to customize based on calculated parameters that change with the simulation. 

So, is there a UDF macro that is being used to implement this exact built in process? I believe it can be done with DEFINE_MASS_TRANSFER, where I would just change the 0.1 values used by default. but is there more to it than this?