ToolsProcessingModelsThermophysicalEquation of stateOptionsPerfect fluidOn this pagePerfect fluidDensity, ρ\rhoρ [kg/m3^33] ρ=ρ0+pRT\rho = \rho_0 + \frac{p}{R T}ρ=ρ0+RTp Entropy, SSS [J/kg/K ] S=−Rln(ppstd)S = -R \ln \left( \frac{p}{p_{\std}} \right)S=−Rln(pstdp) Compressibility, ψ\psiψ [s2^22/m2^22] ψ=1RT\psi = \frac{1}{R T}ψ=RT1 Usage The perfectFluid equation of state is specified as: equationOfState{ R <scalar>; rho0 <scalar>;} Where R : Fluid constant [J/kg/K] rho0 : Reference density [kg/m3^33] Further information Source code perfectFluid