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

页码：927 / 937

页数：11

共 50 条

[21] An estimate for the vorticity of the Navier-Stokes equation
Qian, Zhongmin
COMPTES RENDUS MATHEMATIQUE, 2009, 347 (1-2) : 89 - 92
[22] REMARKS ON THE NAVIER-STOKES EQUATIONS ON THE 2-DIMENSIONAL AND 3-DIMENSIONAL TORUS
LIU, VXS
COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS, 1994, 19 (5-6) : 873 - 900
[23] ALIGNMENT OF VORTICITY AND SCALAR GRADIENT WITH STRAIN RATE IN SIMULATED NAVIER-STOKES TURBULENCE
ASHURST, WT
KERSTEIN, AR
KERR, RM
GIBSON, CH
PHYSICS OF FLUIDS, 1987, 30 (08) : 2343 - 2353
[24] Non-equilibrium Monte Carlo simulation of decaying Navier-Stokes turbulence
Biechele, P
Breuer, HP
Petruccione, F
PHYSICS LETTERS A, 1999, 256 (2-3) : 147 - 152
[25] Non-equilibrium Monte Carlo simulation of decaying Navier-Stokes turbulence
Universität Freiburg, Fakultät für Physik, Hermann-Herder-Str. 3, 79104 Freiburg, Germany
Phys Lett Sect A Gen At Solid State Phys, 2-3 (147-152):
[26] SHARP RATE OF DECAY OF SOLUTIONS TO 2-DIMENSIONAL NAVIER-STOKES EQUATIONS
ZHANG, LH
COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS, 1995, 20 (1-2) : 119 - 127
[27] Dynamics of vorticity moments in shell models of turbulence: a comparison with the Navier-Stokes equation
Gibbon, John D.
Vincenzi, Dario
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2025, 481 (2309):
[28] IS NAVIER-STOKES TURBULENCE CHAOTIC
DEISSLER, RG
PHYSICS OF FLUIDS, 1986, 29 (05) : 1453 - 1457
[29] NUMERICAL SOLUTION OF NAVIER-STOKES EQUATIONS FOR FLOW IN A 2-DIMENSIONAL CAVITY
KAWAGUTI, M
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1961, 16 (11) : 2307 - &
[30] 2-DIMENSIONAL NAVIER-STOKES SIMULATION OF DEFORMATION AND BREAKUP OF LIQUID PATCHES
ZALESKI, S
LI, J
SUCCI, S
PHYSICAL REVIEW LETTERS, 1995, 75 (02) : 244 - 247

← 1 2 3 4 5 →