Dymola liquid metal

Hi,

I'm considering to get a license for Dymola, but I have some questions before I invest in one.

Is it possible to model liquid metal in a closed system using 1D Dymola modeling? I understand that oil and water are common, but can the results be reliable when increasing the viscosity and density that much? I further wonder if it is possible to model vacuum in the closed system as well.

Thanks in advance