| 外场导致的分形体的结构及偶分布函数 |
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| 引用本文： | 李洪,谭志杰,张卫,邹宪武.外场导致的分形体的结构及偶分布函数[J].武汉大学学报(理学版),2000,46(3):353-355. |
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| 作者姓名： | 李洪 谭志杰 张卫 邹宪武 |
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| 作者单位： | 武汉大学,物理学系,武汉,430072 |
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| 基金项目： | 国家自然科学基金（19674042，19834070）；教育部重点科学技术基金资助项目 |
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| 摘 要： | 用计算机模拟，研究了电场下的团簇—团簇凝聚(CCA)和扩散限制凝聚(DLA)的结构转变．结果显示，当电场由弱到强时，凝聚体从典型的无序向有序结构转变，即从DLA和扩散CCA分形体向沿电场方向的链状结构转变．凝聚体的偶分布函数显示．随着外场的增强，体系逐渐从局域有序向长程有序过渡．这些结果有利结构转变．凝聚体的偶分布函数显示．随着外场的增强，体系逐渐从局域有序向长程有序过渡．这些结果有利于加深人们对电场下CCA和DLA的认识和电场下胶体聚集现象的理解．
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| 关 键 词： | 团簇—团簇凝聚 扩散限制凝聚 结构 电流变液链，偶分布函数 |
| 文章编号： | 0253-9888(2000)03-0353-03 |
| 修稿时间： | 2000-01-12 |
Field-Induced Structure and Pair Distribution Function of Fractals |
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| LI Hong,TAN Zhi-jie,ZHANG Wei,ZOU Xian-wu.Field-Induced Structure and Pair Distribution Function of Fractals[J].JOurnal of Wuhan University:Natural Science Edition,2000,46(3):353-355. |
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| Authors: | LI Hong TAN Zhi-jie ZHANG Wei ZOU Xian-wu |
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| Institution: | LI Hong
,TAN Zhi-jie
,ZHANG Wei
,ZOU Xian-wu
;(Department of Physics, Wuhan University, Wuhan, 430072, China) |
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| Abstract: | The structure transitions in cluster-cluster aggregation (CCA) and diffusion-limited aggregation (DLA) under external electric fields have been investigated by computer simulations. With the increase of external electric field, there exists a structure transition from disorder to order, I. E. , the aggregates change from fractals of diffusion-limited CCA and DLA to the electrorheological chains parallel to electric field. Pair distribution shows, the system changes from local order to long-range order gradually with the external field rising. |
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| Keywords: | cluster-cluster aggregation diffusion-limited aggregation structure transition electrorheological chain pair distribution function |
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