[viraj20feb]

Hello,

I am curious about the difference between the two different phaseSystem models, interfaceCompositionPhaseChangePhaseSystem and thermalPhaseChangePhaseSystem.

The iterative process to find the interface temperature T_f is different. I read that for interfaceCompositionPhaseChangePhaseSystem, the driving force for mass transfer is the concentration gradient and that for thermalPhaseChangePhaseSystem is the temperature gradient. Why is this true?

Any explanation is highly appreciated.

Thank you!