Hnat, B. orcid.org/0000-0001-6498-2953, Fuller, P. orcid.org/0009-0004-2816-619X, Kim, E.-J. orcid.org/0000-0001-5607-6635 et al. (1 more author) (2025) Drift wave turbulence and zonal flow development measured by information rate. Plasma Physics and Controlled Fusion, 67 (3). 035021. ISSN 0741-3335
Abstract
Generation of zonal flows by drift wave turbulence in numerical simulations based on the modified Hasegawa-Wakatani model is investigated using Probability Density Functions (PDFs) and information rate which quantifies the number of statistically distinct states generated per unit time in the non-equilibrium system. The evolution of time-dependent PDFs of the electrostatic potential, density, and vorticity is quantified by the information rate and is directly compared. We examine this evolution for the system dominated by the isotropic turbulence as well as the system dominated by anisotropic zonal flows. Impact of zonal flows on turbulence is captured by a narrower PDF of fluctuating velocity perpendicular to zonal flows. The information rates of the turbulent potential and density, which are coupled via fast electron parallel transport, are similar confirming the strong coupling between these quantities during their evolution. In contrast, zonal parts of these fields exhibit a distinct information rate evolution. This suggests that the zonal density structure may develop independently of zonal flows, consistent with recent finding in gyrokinetic simulations.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2025 The Author(s). Original Content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Keywords: | drift wave turbulence, zonal flows, information rate |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mathematics (Leeds) > Applied Mathematics (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Feb 2025 10:26 |
Last Modified: | 06 Mar 2025 15:50 |
Published Version: | https://iopscience.iop.org/article/10.1088/1361-65... |
Status: | Published |
Publisher: | IOP Publishing |
Identification Number: | 10.1088/1361-6587/adb5b5 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:223359 |