Počet záznamů: 1
Properties of Hall-MHD Turbulence at Sub-Ion Scales: Spectral Transfer Analysis
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SYSNO ASEP 0551573 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Properties of Hall-MHD Turbulence at Sub-Ion Scales: Spectral Transfer Analysis Tvůrce(i) 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)Celkový počet autorů 7 Číslo článku 1632 Zdroj.dok. Atmosphere. - : MDPI
Roč. 12, č. 12 (2021)Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova space plasmas ; turbulence ; numerical simulations ; energy dissipation Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Způsob publikování Open access Institucionální podpora UFA-U - RVO:68378289 UT WOS 000735809200001 EID SCOPUS 85121964235 DOI 10.3390/atmos12121632 Anotace 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. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2022 Elektronická adresa https://www.mdpi.com/2073-4433/12/12/1632
Počet záznamů: 1