Numerical investigations of thermodynamic states formed near a reacting, supercritical CH<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msub><mml:mrow /><mml:mn>4</mml:mn></mml:msub></mml:math>/O<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math> flame

The identification of the correct thermodynamic states forming in supercritical mixing and combustion is an important area research engineering. When a multi-component mixture evolves at pressures that are higher than critical each individual component, real-gas (RG) equation state (EoS) must be used order to achieve superior accuracy predictions. However, this may not enough when complex non-linear allows formation multi-phase states. physics modeling occurring conditions subject many efforts it has already been shown play role coupled with fluid-mechanics. In situation, RG EoS needs augmented model can predict pockets liquid vapor certain region, therefore presence “pseudo” phases, commonly discussed thermodynamics no longer applies. Currently, concept vapor-liquid equilibrium (VLE) seems one viable approach describe physics. paper, we focus attention on formed vicinity CH4/O2 flame. particular, investigate occurrence require state-of-the-art thermodynamics. We provide emphasis about numerical issues occur inverse problems solved VLE (as for example obtaining temperature pressure out internal energy, density overall composition) how they avoided. compared corresponding single phase (no VLE) counterpart results analyzed explained. Finally, a-posteriori method explain component compare zero-dimensional, conventional models. idea behind work establish effect relatively simple, canonical configuration, as well helps understand these predicted before-hand.