Vortex merging and spectral cascade in two-dimensional flows

A.H. Nielsen; X. He; J. Juul Rasmussen; T. Bohr

doi:10.1063/1.869027

Vortex merging and spectral cascade in two-dimensional flows

A.H. Nielsen, X. He, J. Juul Rasmussen, T. Bohr

Research output: Contribution to journal › Journal article › Research

Abstract

The merging of two identical vortices is studied numerically using a spectral code. It is noted that the enstrophy cascade is most active on the distorted vortex boundaries, with a Kolmogorov-like spectrum E(k) approximate to k(-alpha), alpha less than or equal to 4, developed at high wave numbers. The inverse energy cascade is completed when the vortices merge into one of larger size. (C) 1996 American Institute of Physics.

Original language	English
Journal	Physics of Fluids
Volume	8
Issue number	9
Pages (from-to)	2263-2265
ISSN	1070-6631
DOIs	https://doi.org/10.1063/1.869027
Publication status	Published - 1996

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title = "Vortex merging and spectral cascade in two-dimensional flows",

abstract = "The merging of two identical vortices is studied numerically using a spectral code. It is noted that the enstrophy cascade is most active on the distorted vortex boundaries, with a Kolmogorov-like spectrum E(k) approximate to k(-alpha), alpha less than or equal to 4, developed at high wave numbers. The inverse energy cascade is completed when the vortices merge into one of larger size. (C) 1996 American Institute of Physics. ",

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AU - He, X.

AU - Juul Rasmussen, J.

AU - Bohr, T.

PY - 1996

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N2 - The merging of two identical vortices is studied numerically using a spectral code. It is noted that the enstrophy cascade is most active on the distorted vortex boundaries, with a Kolmogorov-like spectrum E(k) approximate to k(-alpha), alpha less than or equal to 4, developed at high wave numbers. The inverse energy cascade is completed when the vortices merge into one of larger size. (C) 1996 American Institute of Physics.

AB - The merging of two identical vortices is studied numerically using a spectral code. It is noted that the enstrophy cascade is most active on the distorted vortex boundaries, with a Kolmogorov-like spectrum E(k) approximate to k(-alpha), alpha less than or equal to 4, developed at high wave numbers. The inverse energy cascade is completed when the vortices merge into one of larger size. (C) 1996 American Institute of Physics.

KW - Energimaterialer og ny energiteknologi; Optik og sensorsystemer

U2 - 10.1063/1.869027

DO - 10.1063/1.869027

M3 - Journal article

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VL - 8

SP - 2263

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JO - Physics of Fluids

JF - Physics of Fluids

IS - 9

ER -

Vortex merging and spectral cascade in two-dimensional flows

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