Abstract Trajectory analysis has been extensively applied to simulate the penetration and loading processes of electret filters. However, there is no available literature related to trajectory analysis simulating the initial penetration and particle deposition of electret media with bipolarly charges for particles with Boltzmann equilibrium. By analyzing the forces acting on a particle, trajectory motions of particles were simulated to investigate the penetration of electret media for particles with diameters of 40-600 nm. The simulation results are in good agreement with theoretical equation results and experimental data of other studies. Based on this model, the effects of dipole orientation and particle charge on the particle penetration were also evaluated. For particles with Boltzmann equilibrium, electret media exhibit the smallest penetration when the dipole axis is perpendicular to air flow; whereas, for charged particles, the particle penetration has the smallest value when the charged face of the fiber is opposite to the particle charge facing the incoming flow. Finally, the effects of particle size, particle charge, fiber dipole orientation, and fiber charge on the particle deposition morphology were studied. The simulation model developed in this study can be used to optimize the design and application of electret media. Copyright © 2020 American Association for Aerosol Research

中文翻译：

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双极带电纤维驻极体介质渗透和颗粒沉积的轨迹模拟

摘要 轨迹分析已广泛应用于模拟驻极体滤波器的穿透和加载过程。然而，没有与轨迹分析相关的可用文献，用于模拟具有双极电荷的驻极体介质的初始渗透和粒子沉积，用于具有玻尔兹曼平衡的粒子。通过分析作用在粒子上的力，模拟粒子的轨迹运动，以研究驻极体介质对直径为 40-600 nm 的粒子的渗透。模拟结果与理论方程结果和其他研究的实验数据吻合较好。基于该模型，还评估了偶极子取向和粒子电荷对粒子渗透的影响。对于具有玻尔兹曼平衡的粒子，当偶极轴垂直于气流时，驻极体介质表现出最小的渗透；而对于带电粒子，当纤维的带电面与面向进入流的粒子电荷相反时，粒子穿透力具有最小值。最后，研究了颗粒尺寸、颗粒电荷、纤维偶极子取向和纤维电荷对颗粒沉积形态的影响。本研究中开发的仿真模型可用于优化驻极体介质的设计和应用。版权所有 © 2020 美国气溶胶研究协会 研究了颗粒尺寸、颗粒电荷、纤维偶极子取向和纤维电荷对颗粒沉积形态的影响。本研究中开发的仿真模型可用于优化驻极体介质的设计和应用。版权所有 © 2020 美国气溶胶研究协会 研究了颗粒尺寸、颗粒电荷、纤维偶极子取向和纤维电荷对颗粒沉积形态的影响。本研究中开发的仿真模型可用于优化驻极体介质的设计和应用。版权所有 © 2020 美国气溶胶研究协会