SEMINAIRE DE MECA-FLU Quel niveau de détail pour la

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SEMINAIRE DE MECA-FLU
ONERA – Centre de Châtillon
29 avenue de la Division Leclerc – 92320 CHATILLON
Salle Contensou
Mercredi 23 Mars à 14h00
Quel niveau de détail pour la simulation
de l’injection de fuel ?
François Doisneau
Sandia National Laboratories - Livermore, CA
Numerical simulation of sprays in direct fuel injection aims at assessing the performance
and variability of engines. Efficiently solving this multiscale problem critically relies on
the modeling and numerical strategy. But the choices at stake appear unclear to most of
us. Lagrangian or Eulerian Spray, Real Gas, Interface Capturing: why such a wealth of
approaches? RANS, LES: how can the same problem be computed with cell sizes that
vary from 1μm to 1mm? Atomization, combustion: why are calibrated models used and
what impact has this on the reliability of predictions? These questions are both casual
and challenging and I will discuss them through some aspects of the physics of fuel
injection and through subtleties of today’s numerical approaches for two-phase flows. In
particular, I will show the relevance of the Eulerian Spray approach I am currently
developing for device-size simulations and the prospects it opens up.
Les personnes extérieures à l'ONERA qui souhaiteraient participer au séminaire sont priées de se manifester par retour de
mail ([email protected])