Triboelectric charge distribution in insulative granular systems
首发时间:2013-01-30
Abstract:Triboelectrification of insulative granular system is a common phenomenon yet still not fully understood. Recent industrial and environmental processing technologies demand more comprehensive knowledge on tribo-charge within the flowing granular systems. Based on high-energy state electron hypothesis, here we develop an analytical model to predict the triboelectric charge distribution among particle systems. Particle size dependence of the tribo-charge is revealed, and influence of size range on the tribo-charge probability is evaluated. While the net tribo-charge of an individual particle is unpredictable, an interesting upper bound for the tribo-charge is found. Particle dynamic simulation is also carried out to study the charge transferring within the particle colliding process, which verifies the analytical prediction result.
keywords: Granular system, Tribo-charge particle flow particle dynamic simulation.
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绝缘颗粒系统中颗粒摩擦电荷分布
摘要:绝缘颗粒物质系统内部存在的摩擦生电是一种常见的现象,但并不为人们充分研究。近年来在工业和环境等领域中的很多技术,经常需要对颗粒流中的摩擦生电具备深刻的认识才能够很好的发挥作用。基于高能态电子假说,本文中发展了一套解析模拟来预测颗粒流系统中的摩擦生电现象。建立了颗粒摩擦生电与颗粒粒度的依赖关系,揭示了粒度范围对摩擦电荷产生的概率大小的影响。尽管颗粒系统中单个颗粒的具体带电量无法准确预测,论文中给出了其因摩擦带电可能具有的电荷的上限值。此外,本文还通过颗粒动态模拟程序研究了在颗粒碰撞过程中电荷的具体转移量,得到的结果与分析模型预测的结果吻合。
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