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Atomization and Sprays

Journal of the International Institutes for Liquid Atomization and Spray Systems

ISSN for PRINT: 1045-5110

Institutional price:	$787.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2007, Volume17

96 pages

Issue price - $109.00

A NEW MODEL FOR TURBULENT FLOWS WITH LARGE DENSITY FLUCTUATIONS: APPLICATION TO LIQUID ATOMIZATION

Francois-Xavier Demoulin
Coria UMR6614 CNRS, Université de Rouen, BP 12, Site universitaire du Madrillet, 76801 Saint Etienne du Rouvray Cedex, France

Pierre-Arnaud Beau
Coria UMR6614 CNRS, Université de Rouen, BP 12, Site universitaire du Madrillet, 76801 Saint Etienne du Rouvray Cedex, France

Gregory Blokkeel
PSA Peugeot Citroën, Route de Gisy, 78943 Vélizy-Villacoublay Cedex, France

Arnaud Mura
LCD UPR 9028 CNRS, ENSMA Téléport 2, 1, Avenue Clément Ader − BP 40109, 86961 Futuroscope Chasseneuil Cedex, France

R. Borghi
EGIM, IMT - Technopôle de Château-Gombert, 38, rue Joliot Curie 13451 Marseille Cedex 20, France

ABSTRACT

Based on the original modeling proposal of Borghi and coworkers (A. Vallet, A. A. Burluka, and R. Borghi, Atomization and Sprays, vol. 11, pp. 619-642, 2001), a new model for atomization, focused on the description of the primary breakup, has been developed. For high injection velocities, the dense zone located just at the injector exit is generally not well described because of the strong interactions between complex phenomena. The classical Lagrangian approach that considers individual liquid droplets or blobs is not a satisfactory representation for such complex liquid flow topologies with liquid core ligaments and eventually droplets. Here, a more global approach is used, with liquid and gas considered as two species of a unique turbulent flow. Therefore, the initial liquid dispersion is given by a turbulent liquid mass flux. The purpose of this work is first to evaluate the usual models for this turbulent liquid flux and then to modify them for the specific turbulent flow with a very high density ratio considered here.