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Multiphysics Modelling Applied to Refractory Behaviour in Severe Environments

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Abstract:

It is a common practice to design refractory linings with the help of thermal computations, thermochemistry analyses and strong workman know-how. Their mechanical design is often limited to simple thermo-elastic computations. Sometimes computations are refined considering non-linear mechanical behaviour, even if corrosion often induces additional chemical strain and strong change in service of the mechanical behaviour of the refractory. The aim of this presentation is to briefly recast the irreversible thermodynamic framework in order to underline the implications of some basic thermodynamic concepts in term of refractory behaviour modelling. Then, the use of these concepts to develop fully 3D finite element simulations accounting simultaneously for thermal, mechanical and chemistry phenomena will be illustrated on the particular case of SiC-based refractory. Comparison between long duration oxidation test at high temperature and model prediction allows the validation of the proposed approach. Then, an extension to the industrial case of refractory lining in Waste to Energy plant will be illustrated. The interest of taking into account the thermo-chemo-mechanical coupling effects is shown.

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Periodical:

Advances in Science and Technology (Volume 92)

Pages:

301-309

DOI:

https://doi.org/10.4028/www.scientific.net/AST.92.301

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Online since:

October 2014

Authors:

Eric Blond*, Tarek Merzouki, Nicolas Schmitt, Emmanuel de Bilbao, Alain Gasser

Keywords:

Multiphysics Coupling, Refractory, SiC Oxidation

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* - Corresponding Author

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