Spontaneous suppression of inverse energy cascade in instability-driven 2-D turbulence
Spontaneous suppression of inverse energy cascade in instability-driven 2-D turbulence
复制标题
不稳定驱动的二维湍流中逆能量级联的自发抑制
DOI:
10.1017/jfm.2022.935
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发表时间:
2022
影响因子:
3.7
通讯作者:
Knobloch, Edgar
中科院分区:
文献类型:
--
作者:
van Kan, Adrian;Favier, Benjamin;Julien, Keith;Knobloch, Edgar
Instabilities of fluid flows often generate turbulence. Using extensive direct numerical simulations, we study two-dimensional turbulence driven by a wavenumber-localised instability superposed on stochastic forcing, in contrast to previous studies of state-independent forcing. As the contribution of the instability forcing, measured by a parameter , the condensate breaks down, and a gas of weakly interacting vortices with broken symmetry spontaneously emerges, characterised by preponderance of vortices of one sign only and suppressed inverse energy cascade. The latter transition is shown to depend on the damping mechanism. The number density of SVs in the broken symmetry state slowly increases via a random nucleation process. Bistability is observed between the condensate and mixed SV-condensate states. Our findings provide new evidence for a strong dependence of two-dimensional turbulence phenomenology on the forcing.
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影响因子:
2.7
作者:
J. Jim'enez
通讯作者:
J. Jim'enez
影响因子:
4.6
作者:
A. Sozza;G. Boffetta;Paolo Muratore;S. Musacchio
通讯作者:
S. Musacchio
影响因子:
1.5
作者:
P. Orlandi;G. V. van Heijst
通讯作者:
P. Orlandi;G. V. van Heijst
DOI:
10.1103/physreve.65.056305
发表时间:
2002-05
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子:
--
作者:
C. Pasquero;G. Falkovich
通讯作者:
C. Pasquero;G. Falkovich
影响因子:
3.7
作者:
J. Jiménez
通讯作者:
J. Jiménez