Control of turbulence in boundary layers of superfluid ~4He by filtering out remanent vortices

N. Hashimoto; R. Goto; H. Yano; K. Obara; O. Ishikawa; T. Hata

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Control of turbulence in boundary layers of superfluid ~4He by filtering out remanent vortices

机译：通过滤除剩余的涡旋来控制〜4He超流体边界层中的湍流

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Turbulence in boundary layers of superfluid ~4He is studied using a vibrating wire. We developed a vortex filtering method for providing a superfluid practically free of remanent vortices in which a vibrating wire cannot generate turbulence. Based on this superfluid, we find that vortex lines are nucleated by cooling through the superfluid transition and remain forming bridges between the wire and a surrounding wall. Vibration of the wire causes instability of bridged vortex lines, generating turbulence. Dense vortex lines produce the nonlinear modes of wire vibration, which is very sensitive to temperature, disappearing above 60 mK.

机译：使用振弦研究了〜4He超流体边界层中的湍流。我们开发了一种涡流过滤方法，以提供一种几乎没有残留涡流的超流体，在该流体中，振弦无法产生湍流。基于这种超流体，我们发现涡流线通过超流体过渡带的冷却而成核，并在金属丝和周围的壁之间形成桥梁。导线的振动会导致桥接的涡流线不稳定，从而产生湍流。密集的涡流线产生线振动的非线性模式，该模式对温度非常敏感，在60 mK以上消失。

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来源
《Physical review》 |2007年第2期|020504.1-020504.4|共4页
作者
N. Hashimoto; R. Goto; H. Yano; K. Obara; O. Ishikawa; T. Hata;
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作者单位

Graduate School of Science, Osaka City University, Osaka 558-8585, Japan;

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原文格式 PDF
正文语种 eng
中图分类固体物理学;
关键词
vortices and turbulence; laminar boundary layers; transition to turbulence;

机译：涡流和湍流;层状边界层过渡到湍流;

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1. Observation of Remanent Vortices Attached to Rough Boundaries in Superfluid 4He [J] . Y. Nago, T. Ogawa, A. Mori, Journal of Low Temperature Physics . 2010,第s3a4期

机译：超流 4 He中附着在粗糙边界上的剩余涡流的观测
2. Coflow turbulence of superfluid ~4He in a square channel: Vortices trapped on a cylindrical attractor [J] . Shinichi Ikawa, Makoto Tsubota Physical review. B, Condensed Matter And Materals Physics . 2016,第18期

机译：方形通道中超流体〜4He的同流湍流：涡流被困在圆柱形吸引子上
3. Time-of-Flight Measurements of Vortices Emitted from Quantum Turbulence in Superfluid ~4He [J] . H. Kubo, Y. Nago, A. Nishijima, Journal of Low Temperature Physics . 2013,第5a6期

机译：飞行时间测量超流〜4He中量子湍流产生的涡旋
4. Receptivity to Freestream Turbulence and the Effect of Longitudinal Vortices in Boundary Layers Transition [C] . Yi-Chung Su, Thorwald Herbert IUTAM Symposium on Laminar-Turbulent Transition . 2000

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5. Thermally induced instability to enhance boundary layer turbulence intensity using heat sources and spires to create boundary layer turbulence intensity and control [D] . Yarlagadda, Goutham Kumar. 2016

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6. Perfect Spin-filtering in graphene monolayer-bilayer superlattice with zigzag boundaries [O] . Hang Yu, Jun-Feng Liu -1

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7. 2005: Explicit filtering and reconstruction turbulence modeling for large-eddy simulation of neutral boundary layer flow [O] . Fotini Katopodes Chow, Robert L. Street, Ming Xue, 2015

机译：2005：显式滤波和重建湍流模型，用于中性边界层流的大涡模拟
8. Smart Wall for Control of the Burst Cycle of Longitudinal Vortices in TurbulentBoundary Layers [R] . Corke, T. C. 1997

机译：用于控制湍流边界层中纵向涡旋周期的智能墙

Control of turbulence in boundary layers of superfluid ~4He by filtering out remanent vortices

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