Taylor line swimming in microchannels and cubic lattices of obstacles.
Taylor line swimming in microchannels and cubic lattices of obstacles.
复制标题
泰勒线在微通道和障碍物立方晶格中游动
作者：
J. L. Münch;D. Alizadehrad;S. Babu;H. Stark
微生物自然地在微结构流体中运动。利用多粒子碰撞动力学的模拟方法，我们研究了在微通道和立方格子障碍物中游动的二维起伏泰勒线，它们代表了微结构环境的简单形式。在微通道中，泰勒线沿通道壁以锐角运动，由于与包围壁的水动力相互作用，其游动速度明显提高。而在稀疏障碍物格子中，游泳速度也有所提高，而密集障碍物格子则产生几何游动。这种新型游泳的特点是游泳速度大大提高。由于泰勒线必须与势垒格子的自由空间相适应，所以其游动速度接近于沿泰勒线传播的弯曲波的相速度。在调整其在晶格内的游泳运动时，泰勒线选择特定的游泳方向，我们根据晶格向量对其进行分类。当绘制游泳速度与晶格向量大小的关系图时，我们所有的数据都会折叠在一条主曲线上。最后，我们还报告了障碍格子内更复杂的轨迹。
Microorganisms naturally move in microstructured fluids. Using the simulation method of multi-particle collision dynamics, we study in two dimensions an undulatory Taylor line swimming in a microchannel and in a cubic lattice of obstacles, which represent simple forms of a microstructured environment. In the microchannel the Taylor line swims at an acute angle along a channel wall with a clearly enhanced swimming speed due to hydrodynamic interactions with the bounding wall. While in a dilute obstacle lattice swimming speed is also enhanced, a dense obstacle lattice gives rise to geometric swimming. This new type of swimming is characterized by a drastically increased swimming speed. Since the Taylor line has to fit into the free space of the obstacle lattice, the swimming speed is close to the phase velocity of the bending wave traveling along the Taylor line. While adjusting its swimming motion within the lattice, the Taylor line chooses a specific swimming direction, which we classify by a lattice vector. When plotting the swimming velocity versus the magnitude of the lattice vector, all our data collapse on a single master curve. Finally, we also report more complex trajectories within the obstacle lattice.
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DOI：
10.1016/j.ijnonlinmec.2010.12.010
发表时间：
2011-05
影响因子：
3.2
作者：
D. Crowdy
通讯作者：
D. Crowdy
影响因子：
2.4
作者：
Adhyapak, Tapan Chandra;Stark, Holger
通讯作者：
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正常人体血液在常温和低温条件下的粘度。
影响因子：
3.3
作者：
P. Rand;E. Lacombe;Hamilton E. Hunt;W. H. Austin
通讯作者：
W. H. Austin
床单的最佳游泳。
DOI：
10.1103/physreve.89.060701
发表时间：
2014
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
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通讯作者：
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影响因子：
1.6
作者：
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通讯作者：
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