Reciprocal swimming at intermediate Reynolds number
Reciprocal swimming at intermediate Reynolds number
复制标题
中间雷诺数的往复游泳
DOI:
10.1017/jfm.2022.873
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发表时间:
2022
影响因子:
3.7
通讯作者:
Klotsa, Daphne
中科院分区:
文献类型:
--
作者:
Derr, Nicholas J.;Dombrowski, Thomas;Rycroft, Chris H.;Klotsa, Daphne
In Stokes flow, Purcell's scallop theorem forbids objects with time-reversible (reciprocal) swimming strokes from moving. In the presence of inertia, this restriction is eased and reciprocally deforming bodies can swim. A number of recent works have investigated dimer models that swim reciprocally at intermediate Reynolds numbers . In our analysis we make the important distinction between particle and fluid inertia, both of which need to be considered separately. We asymptotically expand the Navier–Stokes equations in the small-amplitude limit to obtain a system of linear partial differential equations. Using a combination of numerical (finite element) and analytical (reciprocal theorem, method of reflections) methods we solve the system to obtain the dimer's swim speed and show that there are two mechanisms that give rise to motion: boundary conditions (an effective slip velocity) and Reynolds stresses. Each mechanism is driven by two classes of sphere–sphere interactions, between one sphere's motion and (1) the oscillating background flow induced by the other's motion, and (2) a geometric asymmetry induced by the other's presence. We can thus unify and explain behaviours observed in other works. Our results show how sensitive, counterintuitive and rich motility is in the parameter space of finite inertia of particles and fluid.
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影响因子:
2.7
作者:
Thomas Dombrowski;Shannon K. Jones;G. Katsikis;A. Bhalla;Boyce E. Griffith;D. Klotsa
通讯作者:
Thomas Dombrowski;Shannon K. Jones;G. Katsikis;A. Bhalla;Boyce E. Griffith;D. Klotsa
DOI:
10.1098/rspa.2016.0522
发表时间:
2016
期刊:
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
影响因子:
--
作者:
W. Coenen
通讯作者:
W. Coenen
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
B. U. Felderhof;R. Jones
通讯作者:
R. Jones
DOI:
--
发表时间:
2018
期刊:
European journal of mechanics. B, Fluids
影响因子:
--
作者:
B. U. Felderhof;R. Jones
通讯作者:
R. Jones
影响因子:
1.3
作者:
T. Dray
通讯作者:
T. Dray