The condensation scheme currently requires you to specify a characteristic "timescale" over which the condensation occurs. This is important in determining how easily T can drop below T_dew for a given gas, being forced by radiative cooling or other transport processes.
In reality, this is set by the microphysics of the system, but typically the timescale will shrink as the amount of supersaturation increases. There's also a factors depending on the droplet size(s), the available condensation nuclei, and so on.
It would be interesting to implement a (simple!!) microphysical model of condensation into AGNI, which (I think) would fit relatively easily into the current formulation.
The condensation scheme currently requires you to specify a characteristic "timescale" over which the condensation occurs. This is important in determining how easily T can drop below T_dew for a given gas, being forced by radiative cooling or other transport processes.
In reality, this is set by the microphysics of the system, but typically the timescale will shrink as the amount of supersaturation increases. There's also a factors depending on the droplet size(s), the available condensation nuclei, and so on.
It would be interesting to implement a (simple!!) microphysical model of condensation into AGNI, which (I think) would fit relatively easily into the current formulation.