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Pregled bibliografske jedinice broj: 515951

Časopis

Autori: Skender, Marina; Lapenta, Giovanni
Naslov: On the instability of a quasiequilibrium current sheet and the onset of impulsive bursty reconnection
( On the instability of a quasiequilibrium current sheet and the onset of impulsive bursty reconnection )
Izvornik: Physics of plasmas (1070-664X) 17 (2010), 2; 022905-1-022905-11
Vrsta rada: članak
Ključne riječi: magnetic reconnection; plasma instability; plasma magnetohydrodynamics
( magnetic reconnection; plasma instability; plasma magnetohydrodynamics )
Sažetak:
A two-dimensional reconnecting current sheet is studied numerically in the magnetohydrodynamic approach. Different simulation setups are employed in order to follow the evolution of the formed current sheet in diverse configurations: two types of initial equilibria, Harris and force-free, two types of boundary conditions, periodic and open, with uniform and nonuniform grid set, respectively. All the simulated cases are found to exhibit qualitatively the same behavior in which a current sheet evolves slowly through a series of quasiequilibria ; eventually it fragments and enters a phase of fast impulsive bursty reconnection. In order to gain more insight on the nature and characteristics of the instability taking place, physical characteristics of the simulated current sheet are related to its geometrical properties. At the adopted Lundquist number of S=104 and Reynolds number R=104, the ratio of the length to width (aspect ratio) of the formed current sheet is observed to increase slowly in time up to a maximum value at which it fragments. Moreover, additional turbulence applied to the system is shown to exhibit the same qualitative steps, but with the sooner onset of the fragmentation and at smaller aspect ratio.
Izvorni jezik: eng
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://pop.aip.org/resource/1/phpaen/v17/i2/p022905_s1?isAuthorized=no
Broj citata:
Altmetric:
DOI: 10.1063/1.3299326
URL cjelovitog teksta:
Google Scholar: On the instability of a quasiequilibrium current sheet and the onset of impulsive bursty reconnection
Upisao u CROSBI: marina@irb.hr (marina@irb.hr), 13. Lip. 2011. u 13:56 sati



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