Automated detection of coherent Lagrangian vortices in two-dimensional unsteady flows

被引：38

作者：

Karrasch, Daniel ^{[1
]}

Huhn, Florian ^{[1
]}

Haller, George ^{[1
]}

机构：

[1] ETH, Inst Mech Syst, CH-8092 Zurich, Switzerland

来源：

PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2015年 / 471卷 / 2173期

关键词：

coherent Lagrangian vortices; transport; index theory; line fields; closed orbit detection; ocean surface flows; TIME LYAPUNOV EXPONENTS; TRANSPORT BARRIERS; DEFINITION; EDDIES; VORTEX;

D O I：

10.1098/rspa.2014.0639

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Coherent boundaries of Lagrangian vortices in fluid flows have recently been identified as closed orbits of line fields associated with the Cauchy-Green strain tensor. Here, we develop a fully automated procedure for the detection of such closed orbits in large-scale velocity datasets. We illustrate the power of our method on ocean surface velocities derived from satellite altimetry.

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页数：13

相关论文

共 37 条

[1] Detecting coherent structures using braids [J].

Allshouse, Michael R. ;

Thiffeault, Jean-Luc .

PHYSICA D-NONLINEAR PHENOMENA, 2012, 241 (02) :95-105

[2] Systematic methods for the computation of the directional fields and singular points of fingerprints [J].

Bazen, AM ;

Gerez, SH .

IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, 2002, 24 (07) :905-919

[3] Objective Detection of Oceanic Eddies and the Agulhas Leakage [J].

Beron-Vera, Francisco J. ;

Wang, Yan ;

Olascoaga, Maria J. ;

Goni, Gustavo J. ;

Haller, George .

JOURNAL OF PHYSICAL OCEANOGRAPHY, 2013, 43 (07) :1426-1438

[4] Hyperbolic and elliptic transport barriers in three-dimensional unsteady flows [J].

Blazevski, Daniel ;

Haller, George .

PHYSICA D-NONLINEAR PHENOMENA, 2014, 273 :46-62

[5] Global observations of large oceanic eddies [J].

Chelton, Dudley B. ;

Schlax, Michael G. ;

Samelson, Roger M. ;

de Szoeke, Roland A. .

GEOPHYSICAL RESEARCH LETTERS, 2007, 34 (15)

[6] Indian-Atlantic interocean exchange: Dynamics, estimation and impact [J].

de Ruijter, WPM ;

Biastoch, A ;

Drijfhout, SS ;

Lutjeharms, JRE ;

Matano, RP ;

Pichevin, T ;

van Leeuwen, PJ ;

Weijer, W .

JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1999, 104 (C9) :20885-20910

[7]

Delmarcelle T., 1994, Proceedings. Visualization '94 (Cat. No.94CH35707), P140, DOI 10.1109/VISUAL.1994.346326

[8]

DELMARCELLE T, 1994, THESIS STANFORD U ST

[9] Global heat and salt transports by eddy movement [J].

Dong, Changming ;

McWilliams, James C. ;

Liu, Yu ;

Chen, Dake .

NATURE COMMUNICATIONS, 2014, 5

[10]

Farazmand M, 2014, COHERENT ARE VORTICE

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