COHERENCE OF INTENSE LOCALIZED VORTICITY IN DECAYING 2-DIMENSIONAL NAVIER-STOKES TURBULENCE

被引：12
|
作者：
TERRY, PW
NEWMAN, DE
MATTOR, N
机构：
[1] Department of Physics, University of Wisconsin - Madison, Madison
来源：
PHYSICS OF FLUIDS A-FLUID DYNAMICS | 1992年 / 4卷 / 05期
关键词：
D O I：
10.1063/1.858273
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The coupled evolution of an intense localized vortex and decaying Navier-Stokes turbulence in two dimensions is examined in order to identify and describe the physical process allowing regions of intense vorticity to decouple from the eddy cascade and survive as coherent structures. It is found that the shear straining of turbulent eddies by the differential rotation of the intense vortex gives rise to vortex coherence. Dimensional analysis and analytic solution of a closure representation in the asymptotic limit of large shear are used to determine a nonuniform vortex diffusivity produced by turbulent straining, and the spatial structure of turbulence in the vortex. When the shear straining rate exceeds the appropriate measure of the ambient turbulent straining rate, turbulent fluctuations in the vortex interior localize to a narrow layer in the vortex edge. Likewise, vortex diffusion becomes weak, the vortex lifetime becomes large, and greatly exceeds the eddy lifetimes of ambient turbulence.
引用
收藏
页码：927 / 937
页数：11
相关论文
共 50 条
  • [1] DECAYING, 2-DIMENSIONAL, NAVIER-STOKES TURBULENCE AT VERY LONG TIMES
    MATTHAEUS, WH
    STRIBLING, WT
    MARTINEZ, D
    OUGHTON, S
    MONTGOMERY, D
    PHYSICA D, 1991, 51 (1-3): : 531 - 538
  • [2] 2-DIMENSIONAL NUMERICAL NAVIER-STOKES TURBULENCE (STATISTICAL PROPERTIES OF A DECAYING ISOTROPIC INCOMPRESSIBLE STATE)
    DEEM, GS
    ZABUSKY, NJ
    BULLETIN OF THE AMERICAN PHYSICAL SOCIETY, 1968, 13 (11): : 1604 - &
  • [3] Extreme vorticity growth in Navier-Stokes turbulence
    Schumacher, Joerg
    Eckhardt, Bruno
    Doering, Charles R.
    PHYSICS LETTERS A, 2010, 374 (06) : 861 - 865
  • [4] SOME IDEAS ON THE FREELY DECAYING NAVIER-STOKES TURBULENCE
    LIAO, W
    JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 1990, 23 (04): : L159 - L162
  • [5] PARTICLE APPROXIMATION OF THE 2-DIMENSIONAL NAVIER-STOKES EQUATIONS
    LUCQUINDESREUX, B
    RECHERCHE AEROSPATIALE, 1987, (04): : 1 - 12
  • [6] REPRODUCTIVE PROPERTY OF 2-DIMENSIONAL NAVIER-STOKES EQUATIONS
    TAKESHIT.A
    JOURNAL OF THE FACULTY OF SCIENCE UNIVERSITY OF TOKYO SECTION 1-MATHEMATICS ASTRONOMY PHYSICS CHEMISTRY, 1970, 16 : 297 - &
  • [7] EXPLICIT SOLUTIONS OF THE 2-DIMENSIONAL NAVIER-STOKES EQUATIONS
    RANGER, KB
    STUDIES IN APPLIED MATHEMATICS, 1994, 91 (01) : 27 - 37
  • [8] THE CONSTRUCTION OF SOLUTIONS TO THE 2-DIMENSIONAL NAVIER-STOKES EQUATIONS
    RANGER, KB
    STUDIES IN APPLIED MATHEMATICS, 1994, 91 (03) : 205 - 214
  • [9] λ-Navier-Stokes turbulence
    Alexakis, A.
    Biferale, L.
    PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2022, 380 (2219):
  • [10] 2-DIMENSIONAL NAVIER-STOKES FLOW IN UNBOUNDED-DOMAINS
    KOZONO, H
    OGAWA, T
    MATHEMATISCHE ANNALEN, 1993, 297 (01) : 1 - 31
12345