<正> We present a one-dimensional dynamic model of polydisperse granular mixture with the fractal characteristicof the particle size distribution,in which the particles are subject to inelastic mutual collisions...<正> We present a one-dimensional dynamic model of polydisperse granular mixture with the fractal characteristicof the particle size distribution,in which the particles are subject to inelastic mutual collisions and are driven byGaussian white noise.The inhomogeneity of the particle size distribution is described by a fractal dimension D.Thestationary state that the mixture reaches is the result of the balance between energy dissipation and energy injection.Bymolecular dynamics simulations,we have mainly studied how the inhomogeneity of the particle size distribution and theinelasticity of collisions influence the velocity distribution and distribution of interparticle spacing in the steady-state.The simulation results indicate that,in the inelasticity case,the velocity distribution strongly deviates from the Gaussianone and the system has a strong spatial clustering.Thus the inhomogeneity and the inelasticity have great effacts on thevelocity distribution and distribution of interparticle spacing.The quantitative information of the non-Gaussian velocitydistribution and that of clustering are respectively represented.展开更多
基金The project supported by National Natural Science Foundation of China under Grant No. 10675048 and Natural Science Foundation of Xianning College under Grant No. KZ0627
文摘<正> We present a one-dimensional dynamic model of polydisperse granular mixture with the fractal characteristicof the particle size distribution,in which the particles are subject to inelastic mutual collisions and are driven byGaussian white noise.The inhomogeneity of the particle size distribution is described by a fractal dimension D.Thestationary state that the mixture reaches is the result of the balance between energy dissipation and energy injection.Bymolecular dynamics simulations,we have mainly studied how the inhomogeneity of the particle size distribution and theinelasticity of collisions influence the velocity distribution and distribution of interparticle spacing in the steady-state.The simulation results indicate that,in the inelasticity case,the velocity distribution strongly deviates from the Gaussianone and the system has a strong spatial clustering.Thus the inhomogeneity and the inelasticity have great effacts on thevelocity distribution and distribution of interparticle spacing.The quantitative information of the non-Gaussian velocitydistribution and that of clustering are respectively represented.
