Hello, I am currently trying to model some two-phase Heat exchangers, both evaporators and condenser. However, I am always getting at the same problem: when entering in a two-phase flow, the inlet and outlet mass flows are not equal. And the problem is that it is a huge difference (more than a 30%). Has anyone had this problem before? I am using the components from the Thermopower library, the specific one for two-phase flows.

Thank you in advance.