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The piecewise parabolic method and related schemes are widely used to modelstellar flows. Several different methods for extending the validity of thesemethods to a general equation of state have been proposed over time, but directcomparisons amongst one-another and exact solutions with stellar equations ofstate are not widely available. We introduce some simple test problems withexact solutions run with a popular stellar equation of state and test how twoexisting codes with different approaches to incorporating general gasesperform. The source code for generating the exact solutions is made available.

On the Piecewise Parabolic Method for Compressible Flow with Stellar Equations of State