Calculates time derivative of the thermodynamic state record calculated by d and T
function setState_dTX_der input Density d "Density"; input Temperature T "Temperature"; input MassFraction X[:] = reference_X "Mass fractions"; input FixedPhase phase = 0 "2 for two-phase, 1 for one-phase, 0 if not known"; input Real der_d "Time derivative of density"; input Real der_T "Time derivative of temperature"; input Real der_X[:] "Time derivative of mass fractions"; output ThermodynamicState der_state "Time derivative of thermodynamic state"; end setState_dTX_der;