Steady State Properties of One-Dimensional Non-uniform Granular Gases Subjected to Gaussian White Noise Driving  

作　　者：ZHANG Duan-Ming ZHU Hong-Ying LI Rui CHEN Zhi-Yuan ZHANG Ling 

机构地区：[1]Department of Physics Huazhong University of Science and Technology Wuhan 430074 China [2]Department of Physics Xianing College, Xianning 437005 China

出　　处：《Communications in Theoretical Physics》2007年第4X期737-744,共8页理论物理通讯（英文版）

基　　金：The project supported by National Natural Science of China under Grant No. 10675408 and Natural Science Foundation of Xianning College under Grant No. KZ0627

摘　　要：We present a model of non-uniform granular gases in one-dimensional case, whose granularity distribution has the fractal characteristic. We have studied the nonequilibrium properties of the system by means of Monte Carlo method. When the typical relaxation time T of the Brownian process is greater than the mean collision time To, the energy evolution of the system exponentially decays, with a tendency to achieve a stable asymptotic value, and the system finally reaches a nonequilibrium steady state in which the velocity distribution strongly deviates from the Gaussian one. Three other aspects have also been studied for the steady state： the visualized change of the particle density, the entropy of the system and the correlations in the velocity of particles. And the results of simulations indicate that the system has strong spatial clustering; Furthermore, the influence of the inelasticity and inhomogeneity on dynamic behaviors have also been extensively investigated, especially the dependence of the entropy and the correlations in the velocity of particles on the restitute coefficient e and the fractal dimension D.

关 键 词：non-uniform granular gases INELASTICITY fractal dimension D nonequilibrium steady states 

分 类 号：TB3[一般工业技术—材料科学与工程]