Résumé. Dans le domaine de l’analyse de textes, l’extraction de motifs est une technique très populaire pour mettre en évidence des relations fréquentes entre les mots. De même, les techniques de topic modeling ont largement fait leurs preuves lorsqu’il s’agit de classer automatiquement des ensembles de textes partageant des thématiques similaires. Ainsi, ce papier a pour ambition de montrer l’...

The aim of this work is to propose a unified (generalized) closure the chemical source term in context Large Eddy Simulation able cover all regimes turbulent premixed combustion. Turbulence/combustion scale interaction firstly analyzed: new perspective look at commonly accepted combustion diagrams provided based on evidence that actual flames can experience locally several although global non-d...

The dynamic Smagorinsky model for large-eddy simulation of turbulent flow is often applied with some kind spatial averaging to prevent the instability simulations. This paper demonstrates that local constant has a singularity if not applied. identifies large values arising from this as source numerical and proposes an alternative without singularity. improved stability provides good results in ...

Large eddy simulation (LES) is now seen more and more as a viable alternative to current industrial practice, usually based on problem-specific Reynolds-averaged Navier-Stokes (RANS) methods. Access to detailed flow physics is attractive to industry, especially in an environment in which computer modelling is bound to play an ever increasing role. However, the improvement in accuracy and flow d...