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Check for mass conservation

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Old   April 10, 2020, 03:23
Unhappy Check for mass conservation
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Shuyan
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Hello all,

I am doing a transient 2d multiphase simulation with evaporation-condensation. There are no inlets/outlets, the initial volume of water is patched into the region. My primary phase is water and my secondary phase is mixture-template (air + water vapor). I am reporting the mass from the reports>volume-integrals>mass option.

At t=0,
Total Mass = 1.6632497117e+00 kg
Mass of water = 1.6609126049e+00 kg
Mass of mixture-template= 2.3371067885e-03 kg

At t=0.62s,
Total Mass = 1.3104626319e+00 kg
Mass of water = 1.3081499147e+00 kg
Mass of mixture-template= 2.3127171514e-03 kg

Please let me know if I'm checking it correctly, and why it is incorrect, and how can I improve my simulation.
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