| 引用本文: | 兰马群.关于布朗运动“记忆”效应的一个模型.[J].国防科技大学学报,1989,11(2):79-83.[点击复制] |
| Lan Maqun.A Model of Memory Effect of Brownian Motion[J].Journal of National University of Defense Technology,1989,11(2):79-83[点击复制] |
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| 关于布朗运动“记忆”效应的一个模型 |
| 兰马群 |
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(应用物理系)
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| 摘要: |
| 布朗运动能够概括一大类物理现象，因此一直受到人们的重视。近年来，计算机模拟和实验的结果都表明，布朗运动具有“记忆”效应。本文试图对布朗运动“记忆”效应构造一个模型。在稳定情况下计算结果表明，微粒位移涨落的二次矩仍与时间间隔 t 成正比，“记忆”效应表现为流体的粘滞性加大。 |
| 关键词: 分子物理，分子运动论，布朗运动 广义朗之万方程，记忆函数 |
| DOI： |
| 投稿日期：1988-03-03 |
| 基金项目: |
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| A Model of Memory Effect of Brownian Motion |
| Lan Maqun |
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(Department of Applied Physics)
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| Abstract: |
| Much attention has been paid to the Brownian Motion summing up a class of physical phenomena. Recently，both computer simulations and experiments have shown that a “memory effect” is attached to the Brownian motion. A model for describing this effect has been constructed in this paper. The results of the calculations in steady case have shown that the second moment of the displacement fluctuation of micro particles is still proportional to the time intervals，and this effect eventually expresses the increase in fluid viscosity. |
| Keywords: molecular physics,kinetic theory,Brownian motion,Genera-lized Langevin equation,memory functions |
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