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最小趋药性泵的通用最优几何形状。

Universal optimal geometry of minimal phoretic pumps.

机构信息

LadHyX - Département de Mécanique, Ecole Polytechnique - CNRS, Institut Polytechnique de Paris, 91128, Palaiseau, France.

Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge, CB3 0WA, United Kingdom.

出版信息

Sci Rep. 2019 Jul 25;9(1):10788. doi: 10.1038/s41598-019-46953-8.

DOI:10.1038/s41598-019-46953-8
PMID:31346194
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6658517/
Abstract

Unlike pressure-driven flows, surface-mediated phoretic flows provide efficient means to drive fluid motion on very small scales. Colloidal particles covered with chemically-active patches with nonzero phoretic mobility (e.g. Janus particles) swim using self-generated gradients, and similar physics can be exploited to create phoretic pumps. Here we analyse in detail the design principles of phoretic pumps and show that for a minimal phoretic pump, consisting of 3 distinct chemical patches, the optimal arrangement of the patches maximizing the flow rate is universal and independent of chemistry.

摘要

与压力驱动的流动不同，表面介导的趋流流动为在非常小的尺度上驱动流体运动提供了有效的手段。带有非零趋流迁移率的化学活性补丁（例如，Janus 粒子）覆盖的胶体粒子使用自生成的梯度来游动，并且可以利用类似的物理原理来创建趋流泵。在这里，我们详细分析了趋流泵的设计原理，并表明对于由 3 个不同化学补丁组成的最小趋流泵，使流速最大化的补丁的最佳布置是通用的，且与化学无关。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/6d4855701b13/41598_2019_46953_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/0a863fd57c10/41598_2019_46953_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/eec71bd6124a/41598_2019_46953_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/c222fce5370a/41598_2019_46953_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/6d4855701b13/41598_2019_46953_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/0a863fd57c10/41598_2019_46953_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/eec71bd6124a/41598_2019_46953_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/c222fce5370a/41598_2019_46953_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/db44/6658517/6d4855701b13/41598_2019_46953_Fig4_HTML.jpg

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