Fluids

Fluids

Unphysical temperature decrease in Multi-fluid VOF simulation with phase-change

    • acukrov
      Subscriber

      Dear all,

      I have experienced an unphysical decrease in temperature (should be 333,15 K the smallest value in the domain) during water entry of heated solid in a turbulent flow (realizable k-epsilon model is used) in Ansys Fluent 2020 R2. The time step size is set to 1e-5 s, and the temperature goes some very low limits (see Fig. below).

      The question is: "How one can stabilize the energy equation in order to make the minimum temperature 333,15 K as is?"

      Thank you!

      Best regads,

      Alen

    • Rob
      Ansys Employee

      Check the boundary conditions, mesh resolution and phase change settings. How does the convergence look?

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