Saturation on the liquid side will be limited by whatever mass transfer you set up. Worst case you may need to code that: most of the models we see are bubble column/sparger systems so saturation is rare.Â
Sketch out the domain, and write onto the sketch all the boundary conditions, post processing points etc. Post that image here. I'm after a clear representation of what you want to do, not a detailed CAD drawing or van Gogh!  I assume the "sky" will be all gas phase, but your earlier image looks like something flows in the bottom of the domain and out of the top.Â
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