Flow Visualization Study of Quantum Hydrodynamics in Superfluid Helium-4

超流 Helium-4 中量子流体动力学的流动可视化研究

基本信息

  • 批准号:
    1807291
  • 负责人:
  • 金额:
    $ 33.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2018
  • 资助国家:
    美国
  • 起止时间:
    2018-08-01 至 2021-07-31
  • 项目状态:
    已结题

项目摘要

When liquid helium is cooled to about -271 degrees Celsius, it becomes an inviscid superfluid and can do things that other fluids cannot, such as seeping through ultra-thin cracks and climbing over container walls. The fascinating hydrodynamics of superfluid helium has many important scientific and engineering applications. For instance, it supports the most efficient heat-transport mechanism as a coolant material, and it also allows the generation of violent turbulent flows in compact laboratory equipment for model testing of airplanes and ships. However, the lack of quantitative flow measurement tools in this cold fluid has impeded progress in understanding and utilizing its hydrodynamics. In this project, the research team aims to elucidate the nature of emergent properties of various turbulent flows in superfluid helium by employing a newly developed molecular-tagging flow visualization technique. This research is expected to produce fundamental knowledge indispensable for better applications of superfluid helium. The research team is composed of graduate and undergraduate students. These students can gain experience in fluid dynamics, cryogenics, and advanced laser technologies. These skills give the students the technical dexterity necessary to excel in today's science- and technology-dominated market. In addition, the research team plans to conduct demonstrations involving superfluid helium in various educational and outreach programs at the National High Magnetic Field Laboratory to introduce profound scientific concepts to the general public.The objective of the research work is to apply a newly developed molecular tagging velocimetry (MTV) technique to tackle outstanding problems in two forms of flows in superfluid helium: thermal counterflow that can be produced by an applied heat current and quasiclassical flow that can be generated via mechanical forcing. Preliminary study on counterflow in the principle investigator's lab has revealed a novel form of turbulence. Understanding this turbulence is now regarded as one of the most challenging problems in quantum turbulence research. Using the MTV technique, the research team plans to conduct systematic study on how the energy spectrum of the counterflow turbulence may vary with heat flux in a wide range of temperatures. This information can form the base for the development of a theoretical understanding of the intriguing counterflow turbulence. In the experiment on studying towed-grid generated quasiclassical turbulence, flow visualization is combined with second sound attenuation method for probing the motion of the two fluid components in superfluid helium. The research team plans to examine the two-fluid coupling model and measure emergent flow properties that cannot be reliably determined in the past. This work is expected to pave the way for various exciting applications of superfluid helium in future turbulence research.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
当液氦冷却到零下271摄氏度时,它就变成了一种无粘性的超流体,可以做其他流体不能做的事情,比如渗透过超薄的裂缝,爬过容器壁。超流氦令人着迷的流体力学有许多重要的科学和工程应用。例如,它支持最有效的传热机制,作为冷却材料,它也允许在飞机和船舶模型测试的小型实验室设备中产生剧烈的湍流。然而,缺乏这种冷流体的定量流量测量工具阻碍了对其流体动力学的理解和利用。在这个项目中,研究小组旨在通过采用一种新开发的分子标记流动可视化技术来阐明超流氦中各种湍流流动的紧急性质。这项研究有望为超流氦的更好应用提供必不可少的基础知识。研究团队由研究生和本科生组成。这些学生可以获得流体动力学、低温学和先进激光技术方面的经验。这些技能使学生具备了在当今以科技为主导的市场中脱颖而出所必需的技术灵活性。此外,研究小组计划在国家高磁场实验室的各种教育和推广项目中进行涉及超流氦的演示,向公众介绍深刻的科学概念。研究工作的目的是应用一种新开发的分子标记测速(MTV)技术来解决超流氦中两种流动形式的突出问题:由外加热流产生的热逆流和通过机械强迫产生的准经典流动。在首席研究员的实验室里对逆流的初步研究揭示了一种新的湍流形式。理解这种湍流是目前量子湍流研究中最具挑战性的问题之一。利用MTV技术,研究小组计划对逆流湍流的能谱如何在广泛的温度范围内随热通量变化进行系统的研究。这些信息可以形成对有趣的逆流湍流的理论理解发展的基础。在研究拖曳网格产生的准经典湍流的实验中,将流动可视化与二次声衰减方法相结合,探测超流氦中两种流体组分的运动。研究小组计划研究双流体耦合模型,并测量过去无法可靠确定的紧急流动特性。这项工作有望为超流氦在未来湍流研究中的各种令人兴奋的应用铺平道路。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Fully Coupled Two-Fluid Dynamics in Superfluid He4 : Anomalous Anisotropic Velocity Fluctuations in Counterflow
超流体 He4 中的完全耦合二流体动力学:逆流中的反常各向异性速度脉动
  • DOI:
    10.1103/physrevlett.124.155301
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    8.6
  • 作者:
    Yui, Satoshi;Kobayashi, Hiromichi;Tsubota, Makoto;Guo, Wei
  • 通讯作者:
    Guo, Wei
Torque and Angular-Momentum Transfer in Merging Rotating Bose-Einstein Condensates
合并旋转玻色-爱因斯坦凝聚中的扭矩和角动量传递
  • DOI:
    10.1103/physrevlett.124.105302
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    8.6
  • 作者:
    Kanai, Toshiaki;Guo, Wei;Tsubota, Makoto;Jin, Dafei
  • 通讯作者:
    Jin, Dafei
Superdiffusion of quantized vortices uncovering scaling laws in quantum turbulence
量子化涡旋的超扩散揭示了量子湍流中的标度定律
Molecular Tagging Velocimetry in Superfluid Helium-4: Progress, Issues, and Future Development
超流 Helium-4 中的分子标记测速:进展、问题和未来发展
Intermittency enhancement in quantum turbulence in superfluid He4
超流 He4 中量子湍流的间歇增强
  • DOI:
    10.1103/physrevfluids.3.094601
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    2.7
  • 作者:
    Varga, Emil;Gao, Jian;Guo, Wei;Skrbek, Ladislav
  • 通讯作者:
    Skrbek, Ladislav
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Wei Guo其他文献

Seismic response of high-speed railway bridge-track system considering unequal-height pier configurations
考虑不等高桥墩配置的高速铁路桥轨系统地震响应
Phase-generated-carrier-modulated laser interferometer for measurement of ground vibration on an absolute gravimeter
用于在绝对重力计上测量地面振动的相位生成载波调制激光干涉仪
  • DOI:
    10.1364/ao.59.000285
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    1.9
  • 作者:
    Xiong Zhenyu;Wei Guo;Yu Xudong;Long Xingwu;Guo Youguang
  • 通讯作者:
    Guo Youguang
Osteosarcoma cell intrinsic PD-L2 signals promote invasion and metastasis via the RhoA-ROCK-LIMK2 and autophagy pathways
骨肉瘤细胞内在的PD-L2信号通过RhoA-ROCK-LIMK2和自噬途径促进侵袭和转移
  • DOI:
    10.1093/annonc/mdy493.022
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    50.5
  • 作者:
    T. Ren;B. Zheng;Wei Guo
  • 通讯作者:
    Wei Guo
On the amount of counterpart assistance to be provided after natural disasters: from the perspective of indirect economic loss assessment
论自然灾害后的对口援助数额:基于间接经济损失评估的视角
  • DOI:
    10.1080/17477891.2016.1229655
  • 发表时间:
    2017-01
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Wu Xianhua;Guo Ji;Ji Zhonghui;Xue Peipei;Ning Xueqiang;Wei Guo;Wu XH
  • 通讯作者:
    Wu XH
The Implementation of Driver Model Based on the Attention Transfer Process
基于注意力转移过程的驾驶员模型的实现

Wei Guo的其他文献

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{{ truncateString('Wei Guo', 18)}}的其他基金

Conference: Organizing 2024 International Conference on Quantum Fluids and Solids
会议:组织2024年量子流体和固体国际会议
  • 批准号:
    2318163
  • 财政年份:
    2023
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
Stereoscopic visualization study of turbulence and vortex-tangle dynamics in He II
He II 中湍流和涡旋缠结动力学的立体可视化研究
  • 批准号:
    2100790
  • 财政年份:
    2021
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
Adaptive High Order Low-Rank Tensor Methods for High-Dimensional Partial Differential Equations with Application to Kinetic Simulations
高维偏微分方程的自适应高阶低阶张量方法及其在动力学模拟中的应用
  • 批准号:
    2111383
  • 财政年份:
    2021
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
High Reynolds Number Turbulence Research in Cryogenic Helium
低温氦中的高雷诺数湍流研究
  • 批准号:
    1801780
  • 财政年份:
    2018
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
Development and Application of Efficient High-order Semi-Lagrangian Schemes
高效高阶半拉格朗日格式的开发与应用
  • 批准号:
    1830838
  • 财政年份:
    2017
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
Workshop on Quantum Turbulence
量子湍流研讨会
  • 批准号:
    1636539
  • 财政年份:
    2016
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
Development and Application of Efficient High-order Semi-Lagrangian Schemes
高效高阶半拉格朗日格式的开发与应用
  • 批准号:
    1620047
  • 财政年份:
    2016
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Standard Grant
Visualization study of vortex-line dynamics in a magnetically levitated helium-4 superfluid drop
磁悬浮氦 4 超流体液滴涡线动力学的可视化研究
  • 批准号:
    1507386
  • 财政年份:
    2015
  • 资助金额:
    $ 33.5万
  • 项目类别:
    Continuing Grant

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