Global Pressure of One-Dimensional Polydisperse Granular Gases Driven by Gaussian White Noise

作     者：CHEN Zhi-Yuan ZHANG Duan-Ming YANG Feng-Xia HUANG Ming-Tao LI Rui ZHANG Ling ZHU Hong-Ying 

作者机构：Department of Physics Huazhong University of Science and Technology Wuhan 430074 China Department of Physics Xianning College Xianning 437005 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2007年第48卷第3X期

页      面：481-486页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：The project supported by National Natural Science Foundation of China under Grant Nos. 10675048 and 10604017 and Natural Science Foundation of Xianning College under Grant No. KZ0627 

主　　题：global pressure restitution coefficient e fractal dimension D Gaussian white noise polydisperse granular gases 

摘      要：We study the global pressure of a one-dimensional polydisperse granular gases system for the first time, in which the size distribution of particles has the fractal characteristic and the inhomogeneity is described by a fractal dimension D. The particles are driven by Gaussian white noise and subject to inelastic mutual collisions. We define the global pressure P of the system as the impulse transferred across a surface in a unit of time, which has two contributions, one from the translational motion of particles and the other from the collisions. Explicit expression for the global pressure in the steady state is derived. By molecular dynamics simulations, we investigate how the inelasticity of collisions and the inhomogeneity of the particles influence the global pressure. The simulation results indicate that the restitution coefficient e and the fractal dimension D have significant effect on the pressure.