Number of the records: 1
Properties of Hall-MHD Turbulence at Sub-Ion Scales: Spectral Transfer Analysis
- 1.
SYSNO ASEP 0551573 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Properties of Hall-MHD Turbulence at Sub-Ion Scales: Spectral Transfer Analysis Author(s) Papini, E. (IT)
Hellinger, Petr (UFA-U) RID, ORCID
Verdini, A. (IT)
Landi, S. (IT)
Franci, L. (GB)
Montagud-Camps, V. (CZ)
Matteini, L. (GB)Number of authors 7 Article number 1632 Source Title Atmosphere. - : MDPI
Roč. 12, č. 12 (2021)Number of pages 12 s. Language eng - English Country CH - Switzerland Keywords space plasmas ; turbulence ; numerical simulations ; energy dissipation Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Open access Institutional support UFA-U - RVO:68378289 UT WOS 000735809200001 EID SCOPUS 85121964235 DOI 10.3390/atmos12121632 Annotation We present results of a multiscale study of Hall-magnetohydrodynamic (MHD) turbulence, carried out on a dataset of compressible nonlinear 2D Hall-MHD numerical simulations of decaying Alfvenic turbulence. For the first time, we identify two distinct regimes of fully developed turbulence. In the first one, the power spectrum of the turbulent magnetic fluctuations at sub-ion scales exhibits a power law with a slope of & SIM: -2.9, typically observed both in solar wind and in magnetosheath turbulence. The second regime, instead, shows a slope of -7/3, in agreement with classical theoretical models of Hall-MHD turbulence. A spectral-transfer analysis reveals that the latter regime occurs when the energy transfer rate at sub-ion scales is dominated by the Hall term, whereas in the former regime, the governing process is the dissipation (and the system exhibits large intermittency). Results of this work are relevant to the space plasma community, as they may potentially reconcile predictions from theoretical models with results from numerical simulations and spacecraft observations. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2022 Electronic address https://www.mdpi.com/2073-4433/12/12/1632
Number of the records: 1