Reply To: How to setup multiphase mixture? (simulating incubation of agar)

[Rob]

If you start with RH 100% at a certain condition with a compressible gas mixture as you alter the temperature you'll see condensation. However, balancing the conditions along with evaporation/condensation rates may be numerically stiff and/or require very small timesteps to maintain solver accuracy. 

The issue may be as much that setting RH 100% will cause condensation as the temperature falls slightly, so I'm not sure whether that proves your theory, or simply that condensation occurs when a saturated mixture cools.