I have done a flow simulation (solidworks premium 2019) with 3 fluids: Nitrogen, Xenon and water.

They are perfectly separated in different subdomains, no mixing possible.

After running the sim, I check SUrface Parameter for the input and the output of the relative circuits.

The Nitrogen 2kg/min input is 100% as it should be, the output is:

Integral Parameters | |

Integral Parameter | Value |

Mass Flow Rate [kg/min] | -2 |

Volume Flow Rate [m^3/min] | -1,76963898 |

Mass Flow Rate of Xenon [kg/min] | -1,98258981 |

Mass Flow Rate of Water [kg/min] | -1,96867164 |

Volume Flow Rate of Xenon [m^3/min] | -1,75422632 |

Volume Flow Rate of Water [m^3/min] | -1,7418872 |

Surface Area [m^2] | 0,00095156 |

So I see 2 kg/min of totally mass flow, 1,98kg/min is Xenon and 1,96 kg/min is water.(?)

I repeated many times the sim, with different mesh density and the result change only slightly.

Is Flow Simulation not optimized for simulation with 3 different fluids?

P.s.: I tried before with Nitrogen as default and 2 fluid subdomain for Xe and H2O, no change.

E.B.