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LES of atomizing spray with stochastic modeling of secondary breakup

Summary: LES of atomizing spray with stochastic modeling
of secondary breakup
S.V. Apte a,*
, M. Gorokhovski b,1
, P. Moin c
Department of Mechanical Engineering, Stanford University, Bldg. 500, ME/FPC,
488 Escondido Mall, Stanford, CA 94305-3030, USA
Department of Energetics, IUT, University of Rouen, FR-76821, Mont Saint Aignant, France
CTR, Stanford University, Bldg. 500, ME/FPC Stanford, CA 94305-3030, USA
Received 22 November 2002; received in revised form 9 June 2003
A stochastic subgrid model for large-eddy simulation of atomizing spray is developed. Following
KolmogorovŐs concept of viewing solid particle-breakup as a discrete random process, atomization of
liquid blobs at high relative liquid-to-gas velocity is considered in the framework of uncorrelated breakup
events, independent of the initial droplet size. KolmogorovŐs discrete model of breakup is rewritten in the
form of differential Fokker­Planck equation for the PDF of droplet radii. Along with the Lagrangian
tracking of spray dynamics, the size and number density of the newly produced droplets is governed by the


Source: Apte, Sourabh V. - School of Mechanical, Industrial, and Manufacturing Engineering, Oregon State University


Collections: Engineering