| 外电场对荷电颗粒静电凝聚的影响 |
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| 引用本文： | 张向荣,王连泽,朱克勤.外电场对荷电颗粒静电凝聚的影响[J].清华大学学报(自然科学版),2005,45(8):1107-1109. |
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| 作者姓名： | 张向荣 王连泽 朱克勤 |
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| 作者单位： | 清华大学,工程力学系,流体力学研究所,北京,100084 |
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| 基金项目： | 国家自然科学基金资助项目(10472057) |
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| 摘 要： | 为了定量地分析外电场对荷电颗粒静电凝聚的影响,在理论分析和数值模拟的基础上,求解荷电颗粒凝聚的数量平衡方程,分析比较外电场存在与否时,颗粒数量浓度的变化关系。结果表明:外电场促进荷电颗粒间的凝聚;对于初始对称双极荷电颗粒,外电场不改变颗粒初始电荷分布的对称性,并且带任意电荷量的颗粒的数量浓度随凝聚时间单调减少;对于初始非对称双极荷电以及单极荷电颗粒,其数量浓度并非都随凝聚时间单调减少。
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| 关 键 词： | 颗粒凝聚方程 荷电颗粒 凝聚系数 外电场 |
| 文章编号： | 1000-0054(2005)08-1107-03 |
| 修稿时间： | 2004年12月9日 |
Influence of external electric field on the coagulation of electrically charged particles |
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| Zhang Xiangrong,Wang Lianze,ZHU Keqin.Influence of external electric field on the coagulation of electrically charged particles[J].Journal of Tsinghua University(Science and Technology),2005,45(8):1107-1109. |
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| Authors: | Zhang Xiangrong Wang Lianze ZHU Keqin |
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| Abstract: | The effect of an external electric field on the coagulation of bipolar and unipolar charged particles was analyzed numerically by solving the coagulation equation for charged particles. The comparison shows that the coagulation rate of charged particles is increased significantly in the presence of an external electric field. For symmetrically charged particles, the external electric field does not change the symmetry of the initial charge distribution as the coagulation time increases. In addition, the particle number concentration decreases monotonically during coagulation regardless of the magnitude of the particle charge. For asymmetrically charged and unipolar charged particles, however, the particle number concentration does not decrease uniformly during coagulation. |
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| Keywords: | particle coagulation equation electrically charged particles coagulation coefficient external electric field |
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