Visco-resistive plasmoid instability

@article{Comisso2016ViscoresistivePI,
  title={Visco-resistive plasmoid instability},
  author={Luca Comisso and Daniela Grasso},
  journal={Physics of Plasmas},
  year={2016},
  volume={23},
  pages={032111}
}
The plasmoid instability in visco-resistive current sheets is analyzed in both the linear and nonlinear regimes. The linear growth rate and the wavenumber are found to scale as S1/4(1+Pm)−5/8 and S3/8(1+Pm)−3/16 with respect to the Lundquist number S and the magnetic Prandtl number Pm. Furthermore, the linear layer width is shown to scale as S−1/8(1+Pm)1/16. The growth of the plasmoids slows down from an exponential growth to an algebraic growth when they enter into the nonlinear regime. In… 
Parametric Study of Resistive Plasmoid Instability
By using 2.5-dimensional resistive MHD simulations, dynamics of the plasmoid instability in a Harris current sheet has been studied with taking into account two main controlling parameters: the
Plasmoid Instability in Forming Current Sheets
The plasmoid instability has revolutionized our understanding of magnetic reconnection in astrophysical environments. By preventing the formation of highly elongated reconnection layers, it is
Scalings pertaining to current sheet disruption mediated by the plasmoid instability
Analytic scaling relations are derived for a phenomenological model of the plasmoid instability in an evolving current sheet, including the effects of reconnection outflow. Two scenarios are
Plasmoid Instability in Evolving Current Sheets and Onset of Fast Reconnection
The scaling of plasmoid instability maximum linear growth rate with respect to Lundquist number $S$ in a Sweet-Parker current sheet, $\gamma_{max}\sim S^{1/4}$, indicates that at high $S$, the
Effects of plasmoid formation on sawtooth process in a tokamak
For realistic values of Lundquist number in tokamak plasmas, the 1/1 magnetic island leads to the formation of secondary thin current sheet, which breaks up into a chain of small magnetic islands,
Formation of plasmoid chains and fast magnetic reconnection during nonlinear evolution of the tilt instability
We investigate, by means of two-dimensional incompressible magnetohydrodynamic (MHD) numerical simulations, the fast collisional magnetic reconnection regime that is supported by the formation of
Onset of Plasmoid Reconnection during Magnetorotational Instability
The evolution of current sheets in accretion flows undergoing magnetorotational instability (MRI) is examined through two- and three-dimensional numerical modeling of the resistive MHD equations in
Magnetohydrodynamic Turbulence in the Plasmoid-mediated Regime
Magnetohydrodynamic turbulence and magnetic reconnection are ubiquitous in astrophysical environments. In most situations, these processes do not occur in isolation, but interact with each other.
Magnetic reconnection in three-dimensional quasi-helical pinches
This paper deals with the phenomenology of magnetic reconnection during reversed-field pinch helical self-organization. Numerical results obtained by solving a three-dimensional nonlinear
Activation of MHD reconnection on ideal timescales
Magnetic reconnection in laboratory, space and astrophysical plasmas is often invoked to explain explosive energy release and particle acceleration. However, the timescales involved in classical
...
1
2
3
...

References

SHOWING 1-10 OF 130 REFERENCES
Hall magnetohydrodynamic reconnection in the plasmoid unstable regime
A set of reduced Hall magnetohydrodynamic (MHD) equations are used to evaluate the stability of large aspect ratio current sheets to the formation of plasmoids (secondary islands). Reconnection is
Plasmoid instability in double current sheets
The linear behavior of plasmoid instability in double current sheet configurations, namely, double plasmoid mode (DPM), is analytically and numerically investigated within the framework of a reduced
Formation of plasmoid chains in magnetic reconnection.
TLDR
The results suggest that high-Lundquist-number reconnection is inherently time-dependent and hence call for a substantial revision of the standard Sweet-Parker quasistationary picture for S>10(4).
Plasmoid and Kelvin-Helmholtz instabilities in Sweet-Parker current sheets.
TLDR
A two-dimensional (2D) linear theory of the instability of Sweet-Parker current sheets is developed in the framework of reduced magnetohydrodynamics, leading to the prediction that the critical Lundquist number for plasmoid instability in the Pm>>1 regime is S(crit)~10(4)Pm(1/2).
Formation of plasmoids during sawtooth crashes
The nonlinear growth of the internal kink mode is studied numerically using reduced magnetohydrodynamic equations in cylinder geometry. For low Lundquist numbers, S < 107, the already well-known
Scaling laws of resistive magnetohydrodynamic reconnection in the high-Lundquist-number, plasmoid-unstable regime
The Sweet–Parker layer in a system that exceeds a critical value of the Lundquist number (S) is unstable to the plasmoid instability. In this paper, a numerical scaling study has been done with an
On the onset of the plasmoid instability
A numerical study of magnetic reconnection in two-dimensional resistive magnetohydrodynamics for marginally unstable Sweet-Parker current sheets that are subject to plasmoid formation is carried out.
Plasmoid instability in high-Lundquist-number magnetic reconnectiona)
Our understanding of magnetic reconnection in resistive magnetohydrodynamics has gone through a fundamental change in recent years. The conventional wisdom is that magnetic reconnection mediated by
Viscous resistive magnetic reconnection
A unified linear analysis of viscous effects on resistive internal kink and tearing modes in current carrying magnetized plasmas is presented. The plasma is modeled by single‐fluid
Extended theory of the Taylor problem in the plasmoid-unstable regime
A fundamental problem of forced magnetic reconnection has been solved taking into account the plasmoid instability of thin reconnecting current sheets. In this problem, the reconnection is driven by
...
1
2
3
4
5
...