[ram_call]

Hello,
I am simulating an initially saturated tank with refrigerant that the same flow enters 5K subcooled. I used pseudo-transient VOF model with dispersed interface, evaporation and condensation mass transfer. mass flow inlet and pressure outlet BC.

I have the following doubts/questions :

1) at first the outlet mass flow rate is higher than inlet, then it get close to inlet flow gradually. Also without any flow rate at initial runs, the outlet mass flow rate has values! why is that?

2) After some iterations, the temperature in the liquid domain lowered, but liquid volume fraction decreases. It seems liquid is evaporating and no gas is condensing. Why is that?

two mass transfer mechanism of the same type are active from liquid to gas and from gas to liquid (evaporation/condensation)

[ram_call]

The photos of liquid volume fraction and temperature are attached.