外加电场下电介质颗粒层结构重构与悬浮  

Structural reconstruction and levitation of dielectric particle layers in electric fields

作　　者：钱啸宇 阮璇 李水清[1] QIAN Xiaoyu;RUAN Xuan;LI Shuiqing(Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学能源与动力工程系,北京100084

出　　处：《化工学报》2024年第8期2756-2762,共7页CIESC Journal

基　　金：国家自然科学基金项目(52130606)。

摘　　要：施加电场控制荷电颗粒的运动广泛应用于工业过程。目前对电介质颗粒群在电场中行为的研究仍不充分。因此,通过数值模拟研究了电介质颗粒层在外加电场内的完整动力学行为。基于研究结果,首先构建了电场中电介质颗粒的行为模式相图,并推导出相邻区域的边界。进一步表征了颗粒层结构,探究了外场和颗粒间静电作用对结构重构的影响机制。最后,对颗粒层的悬浮运动过程进行了分析。Application of an electric field to control the movement of charged particles is widely used in industrial processes.The behavior of a collection of dielectric particles in electric fields is still insufficiently studied.Therefore,we conduct numerical simulations to investigate the full dynamics of dielectric particle layers in an external electric field.Based on the results,the phase diagram for patterns of particle behaviors in an electric field is constructed,and boundaries between adjacent regions are derived.Then,the structure of particle layers is characterized to explore the influence of external field and interparticle electrostatic interactions on the structural reconstruction.Finally,the levitation process of particle layers is analyzed.

关 键 词：数值模拟 多尺度 颗粒 静电作用 结构重构 悬浮 

分 类 号：TQ021.9[化学工程]