First coherent structure in elasto-inertial turbulence
First coherent structure in elasto-inertial turbulence
复制标题
弹惯性湍流中的第一个相干结构
DOI：
10.1103/physrevfluids.7.073301
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发表时间：
2022
影响因子：
2.7
通讯作者：
Steinberg, V.
中科院分区：
文献类型：
--
作者：
Dubief, Y.;Page, J.;Kerswell, R. R.;Terrapon, V. E.;Steinberg, V.
FENE-P（有限可扩展非线性弹性- peterlin）流体在弹性-惯性湍流（EIT）状态下的二维通道流动模拟揭示了从混沌到以箭头结构形式出现的稳定行波的不同状态。这种连贯的结构提供了对驱动EIT的聚合物/流体相互作用的深入了解。一组受控数值实验和弹性和湍流动能之间传递的研究突出了小尺度和大尺度动力学在EIT流动中混沌自维持循环中的作用。
Two-dimensional channel flow simulations of FENE-P (finitely extensible nonlinear elastic-Peterlin) fluid in the elasto-inertial turbulence (EIT) regime reveal distinct regimes ranging from chaos to a steady traveling wave which takes the form of an arrowhead structure. This coherent structure provides insights into the polymer/flow interactions driving EIT. A set of controlled numerical experiments and the study of transfer between elastic and turbulent kinetic energies highlight the role of small- and large-scale dynamics in the self-sustaining cycle of chaos in EIT flows.