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DOI | 10.1126/science.aam6897 |
Complete measurement of helicity and its dynamics in vortex tubes | |
Scheeler, Martin W.1; van Rees, Wim M.2; Kedia, Hridesh1; Kleckner, Dustin1; Irvine, William T. M.1,3,4,5 | |
2017-08-04 | |
发表期刊 | SCIENCE
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ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2017 |
卷号 | 357期号:6350页码:487-490 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Helicity, a topological measure of the intertwining of vortices in a fluid flow, is a conserved quantity in inviscid fluids but can be dissipated by viscosity in real flows. Despite its relevance across a range of flows, helicity in real fluids remains poorly understood because the entire quantity is challenging to measure. We measured the total helicity of thin-core vortex tubes in water. For helical vortices that are stretched or compressed by a second vortex, we found conservation of total helicity. For an isolated helical vortex, we observed evolution toward and maintenance of a constant helicity state after the dissipation of twist helicity by viscosity. Our results show that helicity can remain constant even in a viscous fluid and provide an improved basis for understanding and manipulating helicity in real flows. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406840100034 |
WOS关键词 | BERRY TOPOLOGICAL PHASE ; TURBULENCE ; RECONNECTION ; CONSERVATION ; VORTICES |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/196605 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Chicago, Dept Phys, Chicago, IL 60637 USA; 2.Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA; 3.Univ Chicago, James Franck Inst, 929 East 57th St, Chicago, IL 60637 USA; 4.Univ Chicago, Enrico Fermi Inst, 929 East 57th St, Chicago, IL 60637 USA; 5.Univ Calif Merced, 5200 Lake Rd, Merced, CA 95343 USA |
推荐引用方式 GB/T 7714 | Scheeler, Martin W.,van Rees, Wim M.,Kedia, Hridesh,et al. Complete measurement of helicity and its dynamics in vortex tubes[J]. SCIENCE,2017,357(6350):487-490. |
APA | Scheeler, Martin W.,van Rees, Wim M.,Kedia, Hridesh,Kleckner, Dustin,&Irvine, William T. M..(2017).Complete measurement of helicity and its dynamics in vortex tubes.SCIENCE,357(6350),487-490. |
MLA | Scheeler, Martin W.,et al."Complete measurement of helicity and its dynamics in vortex tubes".SCIENCE 357.6350(2017):487-490. |
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