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Anisotropy and intermittency in drift-wave turbulence with zonal flows: A two-dimensional continuous wavelet analysis

Year: 2026
Type: article
Abstract: We examine anisotropy and spatial intermittency at small scales in drift-wave turbulence with zonal flows. We use a two-dimensional directional continuous wavelet transform, which allows simultaneous localization in scale, position, and direction. This wavelet analysis is applied to vorticity fields obtained from numerical simulations of the modified Hasegawa–Wakatani model, a reduced model of resistive drift-wave turbulence in magnetized plasmas with zonal flows. Directional wavelet statistics characterize the anisotropy of the turbulence. The second-order moment is enhanced around directions perpendicular to the zonal flow. Spatial intermittency, characterized by scale-dependent flatness, is more pronounced around directions along the zonal flow.
DOI: 10.1063/5.0343309
Institutions: Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya University, Centre National de la Recherche Scientifique, Aix-Marseille Université, Institut de Mathématiques de Marseille, National Institute for Fusion Science
Language: English
Open Access status: green
Funders: Aix-Marseille Université, EUROfusion, European Commission, Euratom Research and Training Programme, Japan Society for the Promotion of Science, National Institute for Fusion Science
Awards: Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium, Statistical universality of three-dimensional homogeneous anisotropic turbulence by large-scale numerical calculations and theoretical analysis, G7828940515, G829439530, G8541789416, G858011915
OpenAlex ID: W7168245733
FWCI:
Cites: 23
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Related to: 10