Transition to instability of the leapfrogging vortex quartet
Transition to instability of the leapfrogging vortex quartet
复制标题
跨越式涡四重奏向不稳定的转变
DOI:
10.1016/j.mechrescom.2023.104068
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发表时间:
2023
影响因子:
2.4
通讯作者:
Behring, Brandon M.
中科院分区:
文献类型:
--
作者:
Goodman, Roy H.;Behring, Brandon M.
The point-vortex system is a system of longstanding interest in nonlinear dynamics, describing the motion of a two-dimensional inviscid fluid that is irrotational except at a discrete set of moving point vortices, at which the vorticity diverges. The leapfrogging orbit consists of two rotating pairs of like-signed vortices which, taken as a quartet, propagate at constant velocity. It is known that if the two pairs are initially widely separated, the motion is stable, while if they are closer together it becomes unstable, with this relation represented by a dimensionless parameter α defined in the text. We here demonstrate analytically that the transition from stability to instability happens at a critical value α= ϕ− 2, where ϕ is the golden ratio. This value had been hypothesized based on careful numerics by Tophøj and Aref, and by the present authors using a semi-analytic argument but not previously demonstrated through exact analysis.
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影响因子:
2.7
作者:
Brandon M. Behring;Roy H. Goodman
通讯作者:
Roy H. Goodman
影响因子:
1.8
作者:
A. Love
通讯作者:
A. Love
影响因子:
3.4
作者:
H. Aref
通讯作者:
H. Aref
DOI:
10.1103/physrevfluids.3.014401
发表时间:
2017
期刊:
arXiv: Pattern Formation and Solitons
影响因子:
--
作者:
Brandon Whitchurch;P. Kevrekidis;V. Koukouloyannis
通讯作者:
V. Koukouloyannis
影响因子:
4.6
作者:
L. Tophøj;H. Aref
通讯作者:
H. Aref