von Karman-Howarth Equation for Hall Magnetohydrodynamics: Hybrid Simulations

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F18%3A00506444" target="_blank" >RIV/68378289:_____/18:00506444 - isvavai.cz</a>

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.3847/2041-8213/aabc06" target="_blank" >https://iopscience.iop.org/article/10.3847/2041-8213/aabc06</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/2041-8213/aabc06" target="_blank" >10.3847/2041-8213/aabc06</a>

Jazyk výsledku

angličtina

Název v původním jazyce

von Karman-Howarth Equation for Hall Magnetohydrodynamics: Hybrid Simulations

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

von Karman-Howarth Equation for Hall Magnetohydrodynamics: Hybrid Simulations

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astrophysical Journal Letters

ISSN

2041-8205

e-ISSN

—

Svazek periodika

857

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

L19

Kód UT WoS článku

000430632600004

EID výsledku v databázi Scopus

2-s2.0-85046471052