Dynamic behavior of non-uniform granular gases system with the fractal characteristic in one dimension

Duan-Ming Zhang, Zhi-Yuan Chen, Yan-Ping Yin, Rui Li, Xiang-Ying Su, Wen-Jing Yang, Ming-Tao Huang, Hong-Ying Zhu and Ling Zhang

Physica A: Statistical Mechanics and its Applications, 2007, vol. 374, issue 1, 187-202

Abstract: A one-dimensional dynamic model of polydisperse granular mixture with a power-law size distribution is presented, in which the particles are subject to inelastic mutual collisions and driven by Gaussian white noise. The particle size distribution of the mixture has the fractal characteristic, and a fractal dimension D as a measurement of the inhomogeneity of the particle size distribution is introduced. We define the global granular temperature and the kinetic pressure of the mixture, and obtain their expressions. By molecular dynamics simulations, we have mainly investigated how the inhomogeneity of the particle size distribution and the inelasticity of collisions influence the steady-state dynamic properties of the system, focusing on the global granular temperature, kinetic pressure, velocity distribution and distribution of interparticle spacing. Some novel results are found that, with the increase of the fractal dimension D, the global granular temperature and the kinetic pressure decrease, the velocity distribution deviates more obviously from the Gaussian one and the particles cluster more pronouncedly at the same value of the restitution coefficient e (0Keywords: Inelasticity; Restitution coefficient e; Inhomogeneity; Fractal dimension D; Non-uniform granular gases (search for similar items in EconPapers)
Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:374:y:2007:i:1:p:187-202

DOI: 10.1016/j.physa.2006.07.003

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