
Extended importance sampling and its application in reliability analysis of the rotating shaft of some horizontal tailplane 
Revised:April 30, 2003 
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DOI：10.7511/jslx20053070 
KeyWord:interparticle collision,MonteCarlo arithmetic,probability density function,gasparticle turbulence 
ZHAO Haibo LIU Zhaohui ZHENG Chuguang~* CHEN Yinmi ZHANG Jif Science Technology Wuhan 430074 China) 

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Abstract: 
Making use of interparticle collisions dynamics and probability of interparticle collision, a MonteCarlo arithmetic is set up to take into account interparticle collisions, which is coupled with a hybrid finitedifferenceMonteCarlo numerical arithmetic that is proposed for Reynold stress model(RSM)probability density distribution function(PDF) twophase turbulence model. This hybrid arithmetic is used to simulate a swirling gasparticle flows which take place in a axial symmetry and suddenly expanded pipe. The result of numerical simulation shows: (1) interparticle collisions redistribute kinetic energy and turbulence kinetic energy of particle in three coordinate directions, as a result, the distribution of those energy inclines to isotropy; (2) because interparticle collisions destroy the fluctuation velocity correlation of particleparticle and particlegas, turbulence kinetic energy of particle and fluctuation velocity correlation of particlegas phase decrease. 


