Viscous effects in planar magnetic X-point reconnection

Details Viscous effects in planar magnetic X-point reconnection Viscous effects in planar magnetic X-point reconnection

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...433.1139c&link_type=abstract

Astronomy and Astrophysics, Volume 433, Issue 3, April III 2005, pp.1139-1143

Astronomy and Astrophysics

Astrophysics

17

Magnetohydrodynamics (Mhd), Sun: Flares

Scientific paper

The impact of viscous dissipation is considered on magnetic reconnection in closed line-tied magnetic X-points. It is shown that viscous effects can provide fast energy dissipation for disturbances which do not alter the initial X-point topology. If the X-point topology is altered, then the rate of viscous dissipation depends on both the perturbed topology and the relative magnitudes of viscosity and electric resistivity. New solutions are demonstrated, which derive from the combination of resistive and viscous effects. The solutions are characterized by monotonically decaying modes which are qualitatively different from the previously known oscillatory modes in nonviscous resistive X-point reconnection. These results suggest that viscous heating in magnetic X-points may be an important effect in solar flares.

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