When using an own RGP file to define a real gas / wet steam material for use in a CFX simulation, and the material is assigned to the material group "User" only, the solver crashes in the 1st iteration with unphysical values for enthalpies, temperatures and other variables.
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One possible reason is the wrong setting of the thermodynamic state of the real gas material. For dry real gas or the vapor component of a dry/wet homogeneous binary mixture real gas, the parameter "Thermodynamic State" must explicitly be set to "Gas", because otherwise the solver assumes the state to be a "Liquid", and only the liquid properties of the RGP table are used. |
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