Stirring by swimmers in confined microenvironments
Stirring by swimmers in confined microenvironments
复制标题
游泳者在有限的微环境中搅拌
DOI:
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
J. Yeomans
中科院分区:
文献类型:
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作者:
D. Pushkin;J. Yeomans
We consider the tracer diffusion Drr that arises from the run-and-tumble motion of low Reynolds number swimmers, such as bacteria. In unbounded dilute suspensions, where dipole swimmers move in uncorrelated runs of length λ, an exact solution showed that Drr is independent of λ. Here, we verify this result in numerical simulations for a particular model swimmer, the spherical squirmer. We also note that in confined microenvironments, such as microscopic droplets, microfluidic devices and bacterial microzones in marine ecosystems, the size of the system can be comparable to λ. We show that this effect alone reduces the value of Drr in comparison to its bulk value, and predict a scaling form for its relative decrease.
影响因子:
3.4
作者:
Croze, Ottavio A.;Ferguson, Gail P.;Poon, Wilson C. K.
通讯作者:
Poon, Wilson C. K.
影响因子:
8.6
作者:
Drescher, Knut;Goldstein, Raymond E.;Tuval, Idan
通讯作者:
Tuval, Idan