Viscous normal modes on coronal inhomogeneities and their role as a heating mechanism

Details Viscous normal modes on coronal inhomogeneities and their role as a heating mechanism Viscous normal modes on coronal inhomogeneities and their role as a heating mechanism

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...304..526s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 304, May 1, 1986, p. 526-531. SERC-NSF-supported research.

Astronomy and Astrophysics

Astrophysics

20

Magnetohydrodynamic Waves, Plasma Heating, Solar Corona, Surface Waves, Viscous Damping, Incompressible Fluids, Inhomogeneity, Resistance Heating, Standing Waves, Wave Propagation

Scientific paper

Viscous damping of Alfven surface waves is examined both analytically and numerically using incompressible MHD. Normal modes are shown to exist on discontinuous as well as continuously varying interfaces in Alfven speed. The waves experience negligible decay below the transition zone. High-frequency waves damp just above the transition region, while those of lower frequency lose energy further out. A comparison of dissipative decay rates shows that wave damping by viscosity proceeds approximately two orders of magnitude faster than by resistivity.

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