Flow generation by rotating colloids in planar microchannels
Flow generation by rotating colloids in planar microchannels
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DOI：
10.1209/0295-5075/92/64003
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发表时间：
2010-12-01
期刊：
影响因子：
1.8
通讯作者：
Gompper, G.
中科院分区：
文献类型：
--
作者：
Goetze, I. O.;Gompper, G.
通过基于粒子的介观流体动力学模拟，研究了微通道中外部旋转磁场驱动的磁胶体的非平衡结构形成以及自旋运动向平移运动的转化。对于直线通道，会找到车道。在环形通道中，通道曲率打破对称性，导致围绕环空的净流体传输，其旋转方向与胶体旋转方向相同。预测了平移速度对通道宽度、环半径、胶体浓度和热运动的依赖性。版权所有 (C) EPLA，2010
Non-equilibrium structure formation and conversion of spinning to translational motion of magnetic colloids driven by an external rotating magnetic field in microchannels is studied by particle-based mesoscale hydrodynamics simulations. For straight channels, laning is found. In ring channels, the channel curvature breaks symmetry and leads to a net fluid transport around the annulus with the same rotational direction as the colloidal spinning direction. The dependence of the translational velocity on channel width, ring radius, colloid concentration, and thermal motion is predicted. Copyright (C) EPLA, 2010