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von Karman-Howarth Equation for Hall Magnetohydrodynamics: Hybrid Simulations
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SYSNO ASEP 0506444 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title von Karman-Howarth Equation for Hall Magnetohydrodynamics: Hybrid Simulations Author(s) Hellinger, Petr (UFA-U) RID, ORCID
Verdini, A. (IT)
Landi, S. (IT)
Franci, L. (IT)
Matteini, L. (FR)Number of authors 5 Article number L19 Source Title Astrophysical Journal Letters. - : Institute of Physics Publishing - ISSN 2041-8205
Roč. 857, č. 2 (2018)Number of pages 5 s. Publication form Print - P Language eng - English Country US - United States Keywords numerical methods ; plasmas ; solar wind Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) Method of publishing Open access Institutional support UFA-U - RVO:68378289 UT WOS 000430632600004 EID SCOPUS 85046471052 DOI 10.3847/2041-8213/aabc06 Annotation A dynamical vectorial equation for homogeneous incompressible Hall-magnetohydrodynamic( MHD) turbulence together with the exact scaling law for third-order correlation tensors, analogous to that for the incompressible MHD, is rederived and applied to the results of two-dimensional hybrid simulations of plasma turbulence. At large (MHD) scales the simulations exhibit a clear inertial range where the MHD dynamic law is valid. In the sub-ion range the cascade continues via the Hall term, but the dynamic law derived in the framework of incompressible Hall-MHD equations is obtained only in a low plasma beta simulation. For a higher beta plasma the cascade rate decreases in the sub-ion range and the change becomes more pronounced as the plasma beta increases. This break in the cascade flux can be ascribed to nonthermal (kinetic) features or to others terms in the dynamical equation that are not included in the Hall-MHD incompressible approximation. 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 2020 Electronic address https://iopscience.iop.org/article/10.3847/2041-8213/aabc06
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