| 电流变液中悬浮粒子的布朗运动与其聚集之间关系 |
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| 引用本文： | 吴烽,汪秉宏,杨月桂,姚斌.电流变液中悬浮粒子的布朗运动与其聚集之间关系[J].物理学报,1996,45(3):403-408. |
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| 作者姓名： | 吴烽 汪秉宏 杨月桂 姚斌 |
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| 作者单位： | (1)中国科学技术大学火灾科学国家重点实验室,合肥230026; (2)中国科学技术大学近代物理系和非线性科学中心,合肥230026; (3)中国科学技术大学力学与机械工程系,合肥230026; (4)中国科学技术大学力学与机械工程系和非线性科学中心,合肥230026 |
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| 摘 要： | 在外电场作用下,电流变液中粒子链的聚集与其布朗运动密切相关。为了具体分析这种关系,采用不分离但有相互运动的双球构成的系统去简化粒子链。通过分析双球系统布朗运动特性,得到其无规运动轨迹维数小于2,大量这样的系统在平面中就不可能均匀分布。这说明由于存在布朗运动,在外电场中电流变液中粒子链必然相互聚集,即形成高密度区与低密度区。
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| 关 键 词： | 电流变液 悬浮粒子 布朗运动 聚集 |
| 收稿时间： | 1994-12-09 |
RELATIONSHIP BETWEEN THE BROWNIAN MOTION OF THE SUSPENDED PARTICLES IN ERF AND THEIR AGGREGATION |
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| WU FENG,WANG BING-HONG,YANG YUE-GUI and YAO BIN.RELATIONSHIP BETWEEN THE BROWNIAN MOTION OF THE SUSPENDED PARTICLES IN ERF AND THEIR AGGREGATION[J].Acta Physica Sinica,1996,45(3):403-408. |
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| Authors: | WU FENG WANG BING-HONG YANG YUE-GUI and YAO BIN |
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| Abstract: | It is known that the Brownian motion is concerned with the aggregation of particle- chains in electrorheological fluids (ERF) under external field. In this paper we suggest a two-sphere model in which we assume that there is internal motion between two spheres but they keep separation from each other for simplifying particle-chain in ERF. Analysing the properties of the Brownian motion of the two-sphere system the result of its trace fractal dimension less than 2 is obtained. In view of the dimension of motion-trace a qualitative explanation of the aggregation of particle-chains in ERF subjected to external electric field, i.e. ,phase separation,is given. |
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