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Seventh International Symposium on Turbulence and Shear Flow Phenomena
July, 28-31, 2011, Ottawa Convention Centre, Ottawa, Canada

DOI: 10.1615/TSFP7

STOCHASTIC MODEL OF SPRAY FORMATION CLOSELY TO AIR-BLAST INJECTOR: LES-SIM (STOCHASTIC INTERFACE MODEL) APPROACH

pages 1-7
DOI: 10.1615/TSFP7.700
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ABSTRACT

Targeting on primary air-blast modeling, the paper proposed a new approach, in which an unsteady, incompressible, immiscible gas-liquid system closely to injector is simulated, as a porous medium implemented in the framework of standard LES approach. Such porosity is characterized by an immersed boundary force, depending on probability of the free interface location, on the outward normal to this interface, and on the rate of velocity change of the relative gas-to-liquid motion. All these parameters are modeled in the paper. Presuming the radius distribution, those parameters give the position and the pinch off direction of produced droplets around the liquid core. In the framework of this approach, the simulation of the gas flow was done, and the spray, formed closely to the air-blast injector, was assessed.

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