Particles-Vortex Interactions and Flow Visualization in 4He
Particles-Vortex Interactions and Flow Visualization in 4He
复制标题
4He 中的粒子-涡旋相互作用和流动可视化
DOI：
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
C. Barenghi
中科院分区：
文献类型：
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作者：
Y. Sergeev;C. Barenghi
最近的实验表明，粒子图像测速（PIV）和粒子跟踪技术在4He湍流研究中的应用取得了显著进展。然而，要解释超流体阶段的实验数据，需要了解示踪粒子的运动如何受到粘性正常流体和非粘性超流体这两种成分的影响。特别重要的是粒子与量子化涡线的相互作用问题，这不仅会强烈地影响粒子的运动，而且在某些条件下，甚至可能将粒子困在量子化涡核上。本文回顾了这个快速发展的研究领域的最新理论、数值和实验结果，批判性地将最近的结果放在一起，并解决了明显的不一致之处。讨论了一种与之密切相关的利用负离子泡检测量子化涡的技术。
Recent experiments have demonstrated a remarkable progress in implementing and use of the Particle Image Velocimetry (PIV) and particle tracking techniques for the study of turbulence in 4He. However, an interpretation of the experimental data in the superfluid phase requires understanding how the motion of tracer particles is affected by the two components, the viscous normal fluid and the inviscid superfluid. Of a particular importance is the problem of particle interactions with quantized vortex lines which may not only strongly affect the particle motion, but, under certain conditions, may even trap particles on quantized vortex cores. The article reviews recent theoretical, numerical, and experimental results in this rapidly developing area of research, putting critically together recent results, and solving apparent inconsistencies. Also discussed is a closely related technique of detection of quantized vortices by negative ion bubbles in 4He.
影响因子：
8.6
作者：
P. Walmsley;A. Golov
通讯作者：
P. Walmsley;A. Golov