Dynamics of the orientation of active and passive scalars in two-dimensional turbulence

G. Lapeyre; B. L. Hua; P. Klein

doi:10.1063/1.1324705

Dynamics of the orientation of active and passive scalars in two-dimensional turbulence

G. Lapeyre
, B. L. Hua
, P. Klein

Research output: Contribution to journal › Article › peer-review

Abstract

The cascades of a passive scalar and vorticity in numerical simulations of freely decaying 2D turbulence were examined. The cascade dynamics is studied through the production of tracer gradients and the tendency for alignment of those gradients with equilibrium directions obtained in the adiabatic approximation. The kinematic properties of the initial conditions show that the conjugation relationship between vorticity and strain, slows down the cascade dynamics, whenever closed streamlines are present.

Original language	English
Pages (from-to)	251-264
Number of pages	14
Journal	Physics of Fluids
Volume	13
Issue number	1
DOIs	https://doi.org/10.1063/1.1324705
Publication status	Published - 1 Jan 2001
Externally published	Yes

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title = "Dynamics of the orientation of active and passive scalars in two-dimensional turbulence",

abstract = "The cascades of a passive scalar and vorticity in numerical simulations of freely decaying 2D turbulence were examined. The cascade dynamics is studied through the production of tracer gradients and the tendency for alignment of those gradients with equilibrium directions obtained in the adiabatic approximation. The kinematic properties of the initial conditions show that the conjugation relationship between vorticity and strain, slows down the cascade dynamics, whenever closed streamlines are present.",

author = "G. Lapeyre and Hua, \{B. L.\} and P. Klein",

year = "2001",

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T1 - Dynamics of the orientation of active and passive scalars in two-dimensional turbulence

AU - Lapeyre, G.

AU - Hua, B. L.

AU - Klein, P.

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Y1 - 2001/1/1

N2 - The cascades of a passive scalar and vorticity in numerical simulations of freely decaying 2D turbulence were examined. The cascade dynamics is studied through the production of tracer gradients and the tendency for alignment of those gradients with equilibrium directions obtained in the adiabatic approximation. The kinematic properties of the initial conditions show that the conjugation relationship between vorticity and strain, slows down the cascade dynamics, whenever closed streamlines are present.

AB - The cascades of a passive scalar and vorticity in numerical simulations of freely decaying 2D turbulence were examined. The cascade dynamics is studied through the production of tracer gradients and the tendency for alignment of those gradients with equilibrium directions obtained in the adiabatic approximation. The kinematic properties of the initial conditions show that the conjugation relationship between vorticity and strain, slows down the cascade dynamics, whenever closed streamlines are present.

U2 - 10.1063/1.1324705

DO - 10.1063/1.1324705

M3 - Article

AN - SCOPUS:0034746277

SN - 1070-6631

VL - 13

SP - 251

EP - 264

JO - Physics of Fluids

JF - Physics of Fluids

IS - 1

ER -

Dynamics of the orientation of active and passive scalars in two-dimensional turbulence

Abstract

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