Vývoj globáních magnetohydrodynamických nestabilit v plazmatu Z-pinče se zahrnutim neideálních efektů

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F04%3A00104054" target="_blank" >RIV/68378289:_____/04:00104054 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Development of global magnetohydrodynamic instabilities in Z-pinch plasmas in the presence of nonideal effects

Popis výsledku v původním jazyce

The development of global magnetohydrodynamic (MHD) instabilities in Z-pinch plasmas has been studied with a three-dimensional hybrid simulation model. Plasma equilibria without and with axial sheared flow, and with different values of the parameter H, which appears as a coefficient before the Hall term in dimensionless nonideal MHD equations, have been considered. Increasing the parameter H leads to larger simulation growth rates for both m = 0 sausage and m = 1 kink modes. The hybrid simulations do however show that axial sheared flow severely curtails the linear and nonlinear development of both sausage and kink instabilities. In these respects, the hybrid simulations are in qualitative agreement with linear Hall MHD results. Moreover, in the nonlinear stage, long wavelength modes dominate the excited wave spectrum when the parameter H is small. For the larger value of the parameter H, small-scale structures do however develop nonlinearly in the excited wave spectrum at late times

Název v anglickém jazyce

Development of global magnetohydrodynamic instabilities in Z-pinch plasmas in the presence of nonideal effects

Popis výsledku anglicky

The development of global magnetohydrodynamic (MHD) instabilities in Z-pinch plasmas has been studied with a three-dimensional hybrid simulation model. Plasma equilibria without and with axial sheared flow, and with different values of the parameter H, which appears as a coefficient before the Hall term in dimensionless nonideal MHD equations, have been considered. Increasing the parameter H leads to larger simulation growth rates for both m = 0 sausage and m = 1 kink modes. The hybrid simulations do however show that axial sheared flow severely curtails the linear and nonlinear development of both sausage and kink instabilities. In these respects, the hybrid simulations are in qualitative agreement with linear Hall MHD results. Moreover, in the nonlinear stage, long wavelength modes dominate the excited wave spectrum when the parameter H is small. For the larger value of the parameter H, small-scale structures do however develop nonlinearly in the excited wave spectrum at late times

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DG - Vědy o atmosféře, meteorologie

OECD FORD obor

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Projekt

<a href="/cs/project/IAB3042106" target="_blank" >IAB3042106: Numerická simulace nelineárních jevů v plazmatu okolí Země</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

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

Název periodika

Physics of Plasmas

ISSN

1070-664X

e-ISSN

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Svazek periodika

11

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

1897-1907

Kód UT WoS článku

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EID výsledku v databázi Scopus

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