Hydrodynamics of micro-swimmers in films
Hydrodynamics of micro-swimmers in films
复制标题
电影中微型游泳者的流体动力学
DOI:
--
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发表时间:
2015
影响因子:
3.7
通讯作者:
T. Shendruk
中科院分区:
文献类型:
--
作者:
A. Mathijssen;A. Doostmohammadi;J. M. Yeomans;T. Shendruk
One of the principal mechanisms by which surfaces and interfaces affect microbial life is by perturbing the hydrodynamic flows generated by swimming. By summing a recursive series of image systems, we derive a numerically tractable approximation to the three-dimensional flow fields of a stokeslet (point force) within a viscous film between a parallel no-slip surface and a no-shear interface and, from this Green’s function, we compute the flows produced by a force- and torque-free micro-swimmer. We also extend the exact solution of Liron & Mochon (J. Engng Maths, vol. 10 (4), 1976, pp. 287–303) to the film geometry, which demonstrates that the image series gives a satisfactory approximation to the swimmer flow fields if the film is sufficiently thick compared to the swimmer size, and we derive the swimmer flows in the thin-film limit. Concentrating on the thick-film case, we find that the dipole moment induces a bias towards swimmer accumulation at the no-slip wall rather than the water–air interface, but that higher-order multipole moments can oppose this. Based on the analytic predictions, we propose an experimental method to find the multipole coefficient that induces circular swimming trajectories, allowing one to analytically determine the swimmer’s three-dimensional position under a microscope.
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影响因子:
8.6
作者:
Hill, Jane;Kalkanci, Ozge;Koser, Hur
通讯作者:
Koser, Hur
影响因子:
3.7
作者:
Crowdy, Darren;Lee, Sungyon;Hosoi, A. E.
通讯作者:
Hosoi, A. E.
影响因子:
8.6
作者:
Berke, Allison P.;Turner, Linda;Lauga, Eric
通讯作者:
Lauga, Eric
DOI:
10.1140/epje/i2013-13004-5
发表时间:
2013
期刊:
The European Physical Journal E
影响因子:
--
作者:
A. Zöttl;H. Stark
通讯作者:
H. Stark
影响因子:
8.6
作者:
Li G;Tang JX
通讯作者:
Tang JX