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arXiv cond-mat/0103426cond-mat.soft
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流动对胶体悬浮液中相互作用测量的影响

Effects of Flow on Measurements of Interactions in Colloidal Suspensions

Yuri O. Popov

摘要:

胶体颗粒的相互作用的流体动力学机制被认为是。该机制基于Grier等人[1-6]在测量期间实验细胞中存在微小背景流的假设。平凡(剪切流)和非平凡(通过粘性流体的力传播)的影响被考虑为两个胶体粒子附近的边界的溶剂壁。径向(吸引或排斥)力和极性扭矩的表达式。给出了产生所观测到的引力强度所需的流量的定量估计,并考虑了其它必要条件。得出结论:所提出的机制很可能不是格里尔等人实验中观察到的吸引力相互作用的原因;然而,它可能适用于其他实验实现,并且在进行高灵敏度的胶体测量时应记住。由于这种机制的相互作用的几个显着特点被确定。

英文摘要:

A hydrodynamic mechanism of interactions of colloidal particles is considered. The mechanism is based on the assumption of tiny background flows in the experimental cells during measurements by Grier at al. [1-6]. Both trivial (shear flow) and non-trivial (force propagation through viscous fluid) effects are taken into account for two colloidal particles near a wall bounding the solvent. Expressions for the radial (attractive or repulsive) forces and the polar torques are obtained. Quantitative estimates of the flow needed to produce the observed strength of attractive force are given, other necessary conditions are also considered. The conclusion is made: the mechanism suggested most likely is not responsible for the attractive interactions observed in the experiments of Grier at al.; however, it may be applicable in other experimental realizations and should be kept in mind while conducting colloidal measurements of high sensitivity. Several distinctive features of the interactions due to this mechanism are identified.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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