Boltzmann statistics in a three-dimensional vibrofluidized granular bed: Idealizing the experimental system

被引：20

作者：

Windows-Yule, C. R. K. ^{[1
]}

Parker, D. J. ^{[1
]}

机构：

[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

来源：

PHYSICAL REVIEW E | 2013年 / 87卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

VELOCITY DISTRIBUTIONS; DYNAMICS; PHYSICS; GASES;

D O I：

10.1103/PhysRevE.87.022211

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The importance of the method of energy injection into a vertically vibrated granular bed was investigated using positron emission particle tracking. A comparison was made between two experimental systems. The first was driven by a flat base, the second by a base comprising a monolayer of spheres, each free to move in three dimensions but constrained to the bottom of the system, effectively randomizing energy transfer into the bed. The latter system exhibited more Gaussian velocity distributions, a more isotropic temperature, and a better approximation of molecular chaos than the former, behavior more akin to the idealized situation of white noise forcing than is generally observed in an experimental system. DOI: 10.1103/PhysRevE.87.022211

引用

页数：5

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