Local to continental scale coupled fire-atmosphere simulation of large industrial fire plume
Résumé
This paper presents an approach to reproduce small to large scale dispersion of smoke induced by industrial fires based on the atmospheric code Meso-NH coupled with the ForeFire surface fire code. Meso-NH can solve explicitly micro to meso-scale meteorology, while ForeFire allows for an e cient parametrization of the injected heat and vapour fluxes. The combination of these two models allows for a straightforward implementation of the heat source term and simultaneously accounts for its e ect on local meteorology (as convection and latent heat), thus leading to a prognostic representation of the developing plume. The context of the study imposed to set model parameters that allow for faster than real time forecast along with a qualitatively realistic representation of the plume. Model evaluation in the vicinity of the fire is performed by comparing results with a combustion CFD solver on an idealized situation, followed by a mesh sensitivity study. Then, the proposed coupled method is applied to a real-case multi-scale simulation of smoke dispersion from the local (city) to the continental scale in a twice faster than real-time computation time.
Domaines
Modélisation et simulationOrigine | Fichiers produits par l'(les) auteur(s) |
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