Non-Gaussian and Clustering Behavior in One-Dimensional Polydisperse Granular Gas System |
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| Authors: | CHEN Zhi-Yuan ZHANG Duan-Ming ZHONG Zhi-Cheng LI Rui |
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| Affiliation: | 1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;1. Department of Physics, Xianning College, Xianning 437005, China;3. Department of Physics, Xiangfan University, Xiangfan 441053, China |
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| Abstract: | We present a one-dimensional dynamic model of polydisperse granular mixture with the fractal characteristic of the particle size distribution, in which the particles are subject to inelastic mutual collisions and are driven by Gaussian white noise. The inhomogeneity of the particle size distribution is described by a fractal dimension D. The stationary state that the mixture reaches is the result of the balance between energy dissipation and energy injection. By molecular dynamics simulations, we have mainly studied how the inhomogeneity of the particle size distribution and the inelasticity 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 Gaussian one and the system has a strong spatial clustering. Thus the inhomogeneity and the inelasticity have great effects on the velocity distribution and distribution of interparticle spacing. The quantitative information of the non-Gaussian velocity distribution and that of clustering are respectively represented. |
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| Keywords: | inelasticity restitution coefficient e inhomogeneity fractal dimension D polydisperse granular gases |
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