Hydrodynamic fluctuation forces
Hydrodynamic fluctuation forces
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水动力脉动力
DOI：
10.1088/0953-8984/14/19/310
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
S. L. P. Mexico
中科院分区：
文献类型：
--
作者：
B. Ivlev;S. L. Potosı́;S. L. P. Mexico
基于流体动力学热涨落介导的力，提出了流体中颗粒相互作用的两种机制。第一种是类似于传统的货车范德华相互作用，但不是由电磁波动介导，它是由流体动力学声波的波动介导。第二个是由于颗粒的热漂移到具有较大有效质量的区域，其由所涉及的周围流体形成并且取决于颗粒间距离。这两种机制可能是相关的解释所观察到的长程吸引力的胶体粒子，因为一组不同的实验表明，吸引能量的顺序kBT，也许，只有波动机制的吸引力可以提供这种普遍性。
Two mechanisms of interaction of particles in a fluid are proposed on the basis of forces mediated by hydrodynamic thermal fluctuations. The first one is similar to the conventional van der Waals interaction, but instead of being mediated by electromagnetic fluctuations, it is mediated by fluctuations of hydrodynamic sound waves. The second one is due to a thermal drift of particles to a region with a bigger effective mass, which is formed by the surrounding fluid involved and depends on the inter-particle distance. Both mechanisms are likely to be relevant in the interpretation of the observed long-range attraction of colloidal particles, since a set of different experiments show an attraction energy of the order of kBT and, perhaps, only a fluctuation mechanism of attraction can provide this universality.