Running an equilibrium phase change model with a binary mixture specified using Redlich and Kwong convergence is impossible when significant condensation occurs and unphysical temperature and gas mass fractions are produced.

If you have set reference enthalpies and/or reference entropies in the specific heat objects then remove them. These are incompatible with the Redlich & Kwong material properties set up which assumes the the vapour reference values are zero at saturation and the liquid values differ by the latent heat.

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