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This allows much greater flexibility in the instantiation of reaction system which may in general depend on fields other than the thermodynamic state. This also simplifies mixture thermodynamics removing the need for the reactingMixture and the instantiation of all the thermodynamic package combinations depending on it.
Stiff chemistry solver validation test cases gri : GRI-Mech 3.0. CH4 combustion, 53 species, 325 reactions h2 : H2 combustion, 10 species, 27 reactions nc7h16 : n-Heptane combustion, 544 species, 2446 reactions ic8h18 : iso-Octane combustion, 874 species, 3796 reactions Results interpreted in 'validation' sub-directory, where OpenFOAM results are compared against those predicted by CHEMKIN II. Overall the best performing ODE solver is seulex followed closely by rodas23.