Evaporating droplets in turbulent reacting flows

Three-dimensional direct numerical simulations are carried out to determine the effects of turbulence on the preferential segregation of an evaporating spray and then to study the evolution of the resulting mixture fraction topology and propagating flame. First, the mixing between an initially rando...

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Bibliographic Details
Published in:Proceedings of the Combustion Institute 2007, Vol.31 (2), p.2319-2326
Main Authors: Reveillon, J., Demoulin, F.X.
Format: Article
Language:English
Subjects:
47.27.Eq
47.27.Gs
47.55.Dz
47.55.Kf
47.70.Fw
Clusters
Combustion
Computational fluid dynamics
Computer Science
Dispersion
DNS
Droplets
Evaporation
Evolution
Fluid flow
Fluid mechanics
Mechanics
Modeling and Simulation
Physics
Spray
Turbulence
Turbulent flow
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Description
Summary:Three-dimensional direct numerical simulations are carried out to determine the effects of turbulence on the preferential segregation of an evaporating spray and then to study the evolution of the resulting mixture fraction topology and propagating flame. First, the mixing between an initially randomly dispersed phase and the turbulent gaseous carrier phase is studied with non-evaporating particles. According to their inertia and the turbulence properties, the formation of clusters of particles is analyzed (formation delay, cluster characteristic size and density). Once the particles are in dynamical equilibrium with the surrounding turbulent flow, evaporation is considered through the analysis of the mixture fraction evolution. Finally, to mimic ignition, a kernel of burnt gases is generated at the center of the domain and the turbulent flame evolution is described.
ISSN:1540-7489
1873-2704
1540-7489
DOI:10.1016/j.proci.2006.07.114