低雷诺数流动中的被动游动

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摘要翻译：
本文讨论了从外部流中提取能量来实现微观游动的可能性，重点讨论了简单三聚体在线性剪切流中的迁移。本文分析了游泳的几何性质，并对泡的情况进行了可能的推广，认为从水流中提取能量的机制似乎是泡的跨槽状态对离散游泳者的推广。游泳者利用外部流动，既提取游泳的能量，又通过它“航行”。偏移速度在冲程振幅上呈线性变化，而不像在静止流体中那样呈二次变化。这种影响与扇贝定理在有外流场时的不适用性有关。
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英文标题：
《Passive swimming in low Reynolds number flows》
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作者：
Piero Olla
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最新提交年份：
2010
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分类信息：

一级分类：Physics        物理学
二级分类：Soft Condensed Matter        软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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一级分类：Physics        物理学
二级分类：Fluid Dynamics        流体动力学
分类描述：Turbulence, instabilities, incompressible/compressible flows, reacting flows. Aero/hydrodynamics, fluid-structure interactions, acoustics. Biological fluid dynamics, micro/nanofluidics, interfacial phenomena. Complex fluids, suspensions and granular flows, porous media flows. Geophysical flows, thermoconvective and stratified flows. Mathematical and computational methods for fluid dynamics, fluid flow models, experimental techniques.
湍流，不稳定性，不可压缩/可压缩流，反应流。气动/流体力学，流体-结构相互作用，声学。生物流体力学，微/纳米流体力学，界面现象。复杂流体，悬浮液和颗粒流，多孔介质流。地球物理流，热对流和层流。流体动力学的数学和计算方法，流体流动模型，实验技术。
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一级分类：Quantitative Biology        数量生物学
二级分类：Other Quantitative Biology        其他定量生物学
分类描述：Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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英文摘要：
  The possibility of microscopic swimming by extraction of energy from an external flow is discussed, focusing on the migration of a simple trimer across a linear shear flow. The geometric properties of swimming, together with the possible generalization to the case of a vesicle, are analyzed.The mechanism of energy extraction from the flow appears to be the generalization to a discrete swimmer of the tank-treading regime of a vesicle. The swimmer takes advantage of the external flow by both extracting energy for swimming and "sailing" through it. The migration velocity is found to scale linearly in the stroke amplitude, and not quadratically as in a quiescent fluid. This effect turns out to be connected with the non-applicability of the scallop theorem in the presence of external flow fields.
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PDF链接：
https://arxiv.org/pdf/1003.1324

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关键词：Quantitative interactions Experimental Mathematical QUANTITATIV energy 振幅 三聚体 静止 速度