Reply To: Volume of Fluid : Contact time estimations

[Rob]

Basically adding in the extra terms aids in solve stability. We aren't able to cover UDFs in the same detail so we're limited to the documentation; albeit we may know where to look. 

That sounds like you're going to have problems find the rates, but.... And treading carefully to remain using public domain knowledge. Mass transfer coeficients generally come down to solubility, and concentration gradients. If you very gently mix both phases in a tank/bottle can you find the rate to then back out a number for Fluent to use in the complex system?