crta
Hrvatska znanstvena Sekcija img
bibliografija
3 gif
 Naslovna
 O projektu
 FAQ
 Kontakt
4 gif
Pregledavanje radova
Jednostavno pretraživanje
Napredno pretraživanje
Skupni podaci
Upis novih radova
Upute
Ispravci prijavljenih radova
Ostale bibliografije
Slični projekti
 Bibliografske baze podataka

Pregled bibliografske jedinice broj: 863748

Zbornik radova

Autori: Skender, Marina; Lapenta, Giovanni
Naslov: Quasi-equilibrium current sheet and the onset of impulsive bursty reconnection
( Quasi-equilibrium current sheet and the onset of impulsive bursty reconnection )
Izvornik:
Skup: 12th Quadrennial Solar-Terrestrial Physics Symposium
Mjesto i datum: Berlin, Njemačka, 12.-16. VII. 2010.
Ključne riječi: quasiequlibrium current sheet, impulsive bursty reconnection, tearing-mode instability, aspect ratio
( quasiequlibrium current sheet, impulsive bursty reconnection, tearing-mode instability, aspect ratio )
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.
Vrsta sudjelovanja: Poster
Vrsta prezentacije u zborniku: PP prezentacija
Vrsta recenzije: Nema recenziju
Izvorni jezik: eng
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://scostep.apps01.yorku.ca/wp-content/uploads/2010/10/Program-Book-STP12.pdf
Upisao u CROSBI: Marina Skender (Marina.Skender@irb.hr), 27. Vel. 2017. u 20:57 sati



Verzija za printanje   za tiskati


upomoc
foot_4