A stochastic subgrid model for the droplet breakup in large eddy simulation is developed. An Eulerian description of the continuous phase is adopted and fully coupled with a Lagrangian definition of the dispersed phase. A stochastic model is incorporated into the equation describing the evolution of the spray probability density function in order to simulate the atomization of sprays in the framework of uncorrelated breakup events. The results of the simulations are compared with experimental data from a diesel injector and in spray in cross flows.
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