Wavelet Analysis of Two-Dimensional MHD Turbulence

Akihiro Ishizawa; Yuji Hattori

doi:10.1143/JPSJ.67.441

Wavelet Analysis of Two-Dimensional MHD Turbulence

Akihiro Ishizawa, Yuji Hattori

IFS - Complex Flow Research Division

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

11 Citations (Scopus)

Abstract

The wavelet analysis is performed on the numerical results of two-dimensional magnetohy-drodynamic (MHD) turbulence. By virtue of simultaneous resolution in scale and position of wavelet decomposition, the intermittent nature is well captured. The whole region is successfully divided into the two regions with different inertial subranges of energy spectra: the turbulent region with E_t(K) ∝ K^-3/2 and the coherent region with ET(K) ∝ K^-2. The local energy transfers by convection of velocity field and by stretching of magnetic field are probably responsible for the transition of turbulent state into coherent state.

Original language	English
Pages (from-to)	441-450
Number of pages	10
Journal	Journal of the Physical Society of Japan
Volume	67
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.67.441
Publication status	Published - 1998 Feb

Keywords

Coherent structure
Mhd turbulence
Self-organization
Wavelet analysis

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AB - The wavelet analysis is performed on the numerical results of two-dimensional magnetohy-drodynamic (MHD) turbulence. By virtue of simultaneous resolution in scale and position of wavelet decomposition, the intermittent nature is well captured. The whole region is successfully divided into the two regions with different inertial subranges of energy spectra: the turbulent region with Et(K) ∝ K-3/2 and the coherent region with ET(K) ∝ K-2. The local energy transfers by convection of velocity field and by stretching of magnetic field are probably responsible for the transition of turbulent state into coherent state.

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KW - Self-organization

KW - Wavelet analysis

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Wavelet Analysis of Two-Dimensional MHD Turbulence

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Keywords

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