Simulation of dark lanes in post-flare supra-arcades. III. A 2D simulation

MAGLIONE, L. S; SCHNEITER, E. MATIAS; COSTA, ANDREA; ELASKAR, S

EDP SCIENCE

Lugar: CAMBRIDGE; Año: 2011 vol. 527 p. 1 - 1

ontext. Observational dark sinuous inflows moving sunwards, along a fan of rays were previously numerically reproduced with two simulations of 1.5D for the first time. We showed that the dark tracks can be explained as hot plasma voids generated upstream of a slow magnetoacoustic shock wave that is produced by a localized deposition of energy. Aims: We aim to confirm our "dark lane" interpretation and to identify specific 2D contributions to the description of the phenomenon. Methods: To solve the ideal and non-stationary MHD equations we used a 2D Riemann solver Eulerian code specially designed to capture supersonic flow discontinuities. Results: The numerical 2D results agree with the observational behaviour, but they show a slight shift in the characteristic parameter with respect to those found previously. Conclusions: We qualitatively confirm the behaviour found in previous papers. For a given numerical domain the period of the kink-like structure is a function of the mag