In this paper, we present a novel model-agnostic machine learning technique to extract reduced thermochemical model for reacting hypersonic flows simulation. A first simulation gathers all relevant thermodynamic states and the corresponding gas properties via given model. The are embedded in low-dimensional space clustered identify regions with different levels of (non)-equilibrium. Then, surro...

[1] Density variations due to changes in bulk chemistry in the lowermost mantle play an important role in the dynamics and chemistry of plumes. In this study we perform a series of high-resolution numerical experiments in an axisymmetric spherical shell to systematically investigate the formation of plumes from a thermochemical boundary layer and the entrainment of the dense material by plumes....

Thermochemical processing methods such as pyrolysis are of growing interest as a means of converting biomass into fuels and commodity chemicals in a sustainable manner. Macroalgae, or seaweed, represent a novel class of feedstock for pyrolysis that, owing to the nature of the environments in which they grow coupled with their biochemistry, naturally possess high metal contents. Although the imp...

This paper presents a correlation to obtain the surface species concentration on stagnation point with mass injection for hypersonic flow. The can be used determine recombination heat fluxes and oxidation levels ablatives or actively cooled shields in thermochemical equilibrium It explicitly expresses wall as function of freestream conditions, coolant properties, stagnation-point geometry, reve...

Abstract The development of a consistent framework for Calphad model sensitivity is necessary the rational reduction uncertainty via new models and experiments. In present work, theory was developed, closed‐form expression log‐likelihood gradient Hessian multi‐phase equilibrium measurement presented. inherent locality defined metric mitigated through use Monte Carlo averaging. A case study Cr–N...

Abstract This paper presents a summary of the FactSage thermochemical software and databases. FactSage was introduced in 2001 and is the fusion of the FACT-Win/F*A*C*T and ChemSage/SOLGASMIX thermochemical packages that were founded over 25 years ago. The FactSage package runs on a PC operating under Microsoft Windows and consists of a series of information, database, calculation and manipulati...