Numerical simulations of fast MHD waves in a coronal plasma. III - Nonlinear periodic pulsations

Details Numerical simulations of fast MHD waves in a coronal plasma. III - Nonlinear periodic pulsations Numerical simulations of fast MHD waves in a coronal plasma. III - Nonlinear periodic pulsations

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..144..255m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 144, no. 2, p. 255-266.

Physics

21

Coronal Loops, Magnetohydrodynamic Waves, Solar Physics, Flux Density, Gas Density, Wave Propagation

Scientific paper

A method is presented for the numerical study of the temporal evolution of nonlinear periodic waves in solar coronal loops which are approximated by smoothed slabs of enhanced gas density embedded within a uniform magnetic field. This method uses a fast Fourier transform technique to calculate spatial derivatives and a modified Euler algorithm for the time scheme for solving cold magnetohydrodynamic equations that govern nonlinear perturbations. The numerical results show that nonlinearity can play a significant role, leading to wave breaking of the kink wave and slab demolition for the sausage one. The kink periodic wave adjusts better to the smoothed slab than the sausage wave.

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