Reply To: turbulent viscosity ratio and convergence issues

[Rob]

Which is a different warning and may, or may not be caused by the turbulence warning. More likely the energy equation (temperature field) isn't stable and that's causing the rest of the solver to struggle and then fail. 

With condensation you're changing phase (fairly obvious). But... That also may result in a large volume change and also large amounts of energy being absorbed or released (latent heat). If the time scale of condensation isn't being captured or you're trying to add too much liquid/vapour to a small cell things can begin to go wrong. Hence looking at contours of temperature, phase, velocity etc inside the domain. You need to see where problems are coming from, and from that figure out what needs changing to obtain a good result.