Shock identification and classification in 2D MHD compressible turbulence -- Orszag-Tang vortex

Abstract

Compressible magnetohydrodynamic (MHD) turbulence is a common feature of astrophysical systems such as the solar atmosphere and interstellar medium. Such systems are rife with shock waves that can redistribute and dissipate energy. For an MHD system, three broad categories of shocks exist (slow, fast or intermediate) however the occurrence rates of each shock type is not known for turbulent systems. Here we present a method for detecting and classifying the full range of MHD shocks applied to the Orszag-Tang vortex. Our results show that the system is dominated by fast and slow shocks, with far less frequent intermediate shocks appearing most readily near magnetic reconnection sites. We present a potential mechanism that could lead to the formation of intermediate shocks in MHD systems, and study the coherency and abundances of shocks in compressible MHD turbulence.

arXiv commentAccepted for publication in Experimental Results

References in corpus (11)

• Interstellar Turbulence I: Observations and Processes
• Kinetic dissipation and anisotropic heating in a turbulent collisionless plasma
• Structures in magnetohydrodynamic turbulence: detection and scaling
• Shock Dissipation in Magnetically Dominated Impulsive Flows
• The formation and evolution of reconnection-driven slow-mode shocks in a partially ionised plasma
• Evidence of Shock-Driven Turbulence in the Solar Chromosphere
• Magnetohydrodynamic structure of a plasmoid in fast reconnection in low-beta plasmas
• Shock Waves and Energy Dissipation in Magnetohydrodynamic Turbulence
• Magnetohydrodynamic Non-linearities in Sunspot Atmospheres: Chromospheric Detections of Intermediate Shocks
• Intermediate shock substructures within a slow-mode shock occurring in partially ionised plasma
• Stability of two-fluid partially-ionised slow-mode shock fronts

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• On the Relationship between Solar Spicules and Propagating Coronal Disturbances: The Role of Shocks
• Decomposing wave activity in the solar atmosphere: Shocks, jets and swirls in the quiet Sun