Viscous dissipation in 3D spine reconnection solutions
Ian J.D. Craig,N. Lopez +1 more
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TLDR
It is shown that viscous dissipation in spine reconnection models can dominate resistive damping by many orders of magnitude and applies to current sheet “fan” solutions.Abstract:
Aims. We consider the influence of viscous dissipation on “spine” reconnection solutions in coronal plasmas. It is known from 2D and 3D “fan” reconnection studies that viscous losses can be important. We extend these arguments to 3D “spine” reconnection solutions. Methods. Steady 3D spine reconnection models were constructed by time relaxation of the governing visco-resistive MHD equations. Scaling laws were derived that compare the relative importance of viscous and resistive damping. Results. It is shown that viscous dissipation in spine reconnection models can dominate resistive damping by many orders of magnitude. A similar conclusion, but with less severe implications, applies to current sheet “fan” solutions. These findings are not sensitive to whether classical or Braginskii viscosity is employed.read more
Citations
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Extended Magnetohydrodynamic Simulations of Decaying, Homogeneous, Approximately-Isotropic and Incompressible Turbulence
TL;DR: In this paper, the effects of the Hall and gyro-viscosity on the energy transfer in the equations of motions of motions were studied by means of direct numerical simulations of freely decaying, homogeneous and approximately isotropic turbulence.
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The effect of anisotropic viscosity on the nonlinear MHD kink instability
TL;DR: It is shown that the form of viscosity has a significant effect on the nonlinear dynamics of the instability, affecting the behaviour of magnetic relaxation, the formation of secondary instabilities and the Ohmic and viscous heating produced.
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The Evolution of Quasi-Separatrix Layer in Two Solar Eruptive Events
TL;DR: In this article, the authors used the theory of quasi-separatrix layer (QSL) to calculate the logarithmic distribution of Q-factors at different heights above the solar photosphere with the results of the PF and NLFFF extrapolations, in order to determine the location of QSL.
References
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Book
Magnetic Reconnection: MHD Theory and Applications
Eric Priest,Terry G. Forbes +1 more
TL;DR: Magnetic reconnection is at the core of many dynamic phenomena in the universe, such as solar flares, geomagnetic substorms and tokamak disruptions as discussed by the authors.
Journal ArticleDOI
Three-dimensional kinematic reconnection in the presence of field nulls and closed field lines
Yun-Tung Lau,John M. Finn +1 more
TL;DR: In this article, the geometric structures of configurations with a pair of type A and B nulls permit reconnection across the null-null lines; these are the field lines which join the two nulls.
Journal ArticleDOI
Numerical tests of fast reconnection in weakly stochastic magnetic fields
TL;DR: In this paper, the effects of turbulence on magnetic reconnection using three-dimensional direct numerical simulations were studied. And the authors found that the reconnection speed is proportional to the square root of the injected power, as predicted by the model.
Journal ArticleDOI
Magnetic Reconnection at Three-Dimensional Null Points
Eric Priest,Viacheslav S. Titov +1 more
TL;DR: In this article, the skeleton of an isolated null point in three dimensions consists of a "spine curve" and a "fan surface" and the kinematics of steady reconnection at such a null point are considered, depending on the nature of the imposed boundary conditions on the surface that encloses the null, in particular on a cylindrical surface with its axis along the spine.
Magnetic Reconnection at Three-Dimensional Null Points
Eric Priest,Viacheslav S. Titov +1 more
TL;DR: In this article, the skeleton of an isolated null point in three dimensions consists of a "spine curve" and a "fan surface" and the kinematics of steady reconnection at such a null point are considered, depending on the nature of the imposed boundary conditions on the surface that encloses the null, in particular on a cylindrical surface with its axis along the spine.
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