Computer Science – Numerical Analysis
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994soph..151..305m&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 151, no. 2, p. 305-317
Computer Science
Numerical Analysis
25
Computerized Simulation, Coronal Loops, Magnetohydrodynamic Generators, Mass Distribution, Solar Prominences, Wave Scattering, Magnetic Dispersion, Numerical Analysis, Plasma Heating, Propagation Modes, Reflected Waves, Shock Wave Attenuation, Shock Wave Propagation
Scientific paper
Impulsively generated waves in solar coronal loops are numerically simulated in the framework of cold magnetohydrodynamics. Coronal inhomogeneities are approximated by gas density slabs embedded in a uniform magnetic field. The simulations show that an initially excited pulse results in the propagation of wave packets which correspond to both trapped and leaky waves. Whereas the leaky waves propagate outside the slab, the trapped waves occur as a result of a total reflection from the slab walls. Time signatures of these waves are made by a detection of the trapped waves at a fixed spatial location. For waves excited within the slab, time signatures exhibit periodic, quasi-periodic and decay phases. The time signatures for waves excited outside the slab, or for a multi-series of variously shaped impulses generated at different places and times, can possess extended quasi-periodic phases. The case of parallel slabs, when the presence of a second slab influences the character of wave propagation in the first slab, exhibits complex time signatures as a result of solitary waves interaction.
Murawski Kris
Roberts Barney B.
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