Viscous Energy Dissipation by Flux Pile-Up Merging in the Solar Corona |
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| Authors: | Email author" target="_blank">Yuri?E?LitvinenkoEmail author |
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| Institution: | (1) Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, Durham, NH, 03824-3525, U.S.A. |
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| Abstract: | Magnetic field annihilation in resistive viscous incompressible plasmas is analyzed. Anisotropic viscous transport is modeled
by the dominant terms in the Braginskii viscous stress tensor. An analytical solution for steady-state magnetic merging, driven
by vortical plasma flows in two dimensions, is derived. Resistive and viscous energy dissipation rates are calculated. It
is shown that, except in the limiting case of zero vorticity, viscous heating can significantly exceed Joule heating at the
merging site. The results strongly suggest that viscous dissipation can provide a significant fraction of the total energy
release in solar flares, which may have far-reaching implications for flare models. |
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