Particle dynamics simulations of triboelectric charging in granular insulator systems
Particle dynamics simulations of triboelectric charging in granular insulator systems
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DOI：
10.1016/j.elstat.2007.08.005
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发表时间：
2008-01-01
影响因子：
1.8
通讯作者：
Lacks, Daniel J.
中科院分区：
文献类型：
--
作者：
Duff, Nathan;Lacks, Daniel J.
进行颗粒动力学模拟来研究由单一绝缘材料组成的颗粒系统中的摩擦起电。模拟实现了一个模型，其中被捕获在局部高能态的电子可以在碰撞过程中转移到另一个粒子的低能态。结果表明，仅这种效应就可以在系统中产生静电，并导致电子从较大颗粒向较小颗粒的净转移。对于单一粒径的系统，充电量很小，但对于具有多分散粒径的系统，由于从较大颗粒到较小颗粒的净电子转移，充电量变得更大。在颗粒系统的现场研究和实验室实验中已经观察到较小颗粒的负电荷和较大颗粒的正电荷。 (c) 2007 Elsevier B.V. 保留所有权利。
Particle dynamics simulations are carried out to study triboelectric charging in granular systems composed of a single insulating material. The simulations implement a model in which electrons trapped in localized high energy states can be transferred during collisions to low energy states in the other particle. It is shown that this effect alone can generate electrostatic charging in the system, and cause net electron transfer from larger particles to smaller particles. The magnitude of charging is small for systems of a single particle size but becomes much greater for a system with polydispersal particle sizes, due to the net electron transfer from larger to smaller particles. The negative charge of smaller particles, and positive charge of larger particles has been observed in field studies and laboratory experiments of granular systems. (c) 2007 Elsevier B.V. All rights reserved.