Numerical simulation of coronal heating by resonant absorption of Alfven waves

Details Numerical simulation of coronal heating by resonant absorption of Alfven waves Numerical simulation of coronal heating by resonant absorption of Alfven waves

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..123...83p&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 123, no. 1, 1989, p. 83-115. Research supported by FNRS and Katholieke Universiteit Leuven.

Physics

98

Computerized Simulation, Coronal Loops, Magnetohydrodynamic Waves, Magnetohydrodynamics, Solar Corona, Absorption, Acoustic Propagation, Energy Dissipation, Finite Element Method, Plasma Heating, Solar Heating

Scientific paper

Resonant absorption of Alfven waves is investigated in a resistive compressible plasma. The resistive MHD equations are solved numerically using a very accurate numerical code based on the finite element method. The loops are approximated by straight cylindrical, axisymmetric plasma columns and the incident waves which excite the coronal loops are modeled by a periodic external driver. The results show that resonant absorption is very efficient for typical parameter values occurring in the loops of the solar corona. A considerable part of the energy supplied by the external driver is dissipated ohmically and converted into heat. The heating of the plasma is localized in a narrow resonant layer. The efficiency of the heating mechanism and the localization of the heating strongly depend on the frequency of the external driver. Resonant absorption is extremely efficient when the plasma is excited with a frequency near that of a 'collective mode'.

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