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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

DEVELOPMENT OF A COMBINED VOF-LPT METHOD TO SIMULATE TWO-PHASE FLOWS IN VARIOUS REGIMES

pages 1-6
DOI: 10.1615/TSFP7.690
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Краткое описание

The breakup of a liquid jet into irregular liquid structures and droplets leading to the formation of a dilute spray has been simulated numerically. To overcome the shortcomings of certain numerical methods in specific flow regimes, a combined approach has been chosen. The intact liquid core, its primary breakup and the dense spray regime are simulated using the Volumes of Fluid (VOF) method in combination with Large Eddy Simulation (LES), while the Lagrangian Particle Tracking (LPT) approach in the LES context is applied to the dilute spray regime and the secondary breakup of droplets. A method has been developed to couple both simulations on a statistical basis. This statistical coupling approach allows to reflecting the dominating physical mechanisms of the two-phase flow in each regime to a high degree, but is at the same time computationally more efficient than comparable approaches. The coupling approach applies for the atomization of a fuel jet in a high pressure chamber, demonstrating the efficiency of the computations.

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