Turbulence and order in magnetized flowing plasmas

Abstract

This whitepaper was submitted to the 2019-2020 APS-DPP-CPP (American Physical Society Division of Plasma Physics Community Planning Process) on plasma discovery science. It highlights the need for diverse computational approaches including global and local models, as well as the need for a hierarchy of physics models in complex and multi-scale magnetically and flow-dominated astrophysical systems. Examples of turbulent small-scale vs. large-scale dynamos and turbulent vs. ordered zonal flows in such systems are discussed.

References in corpus (22)

• Astrophysical magnetic fields and nonlinear dynamo theory
• Simulations of small-scale turbulent dynamo
• Sustained Magnetorotational Turbulence in Local Simulations of Stratified Disks with Zero Net Magnetic Flux
• Magnetic Helicity Conservation and Astrophysical Dynamos
• A New Dynamical Mean-Field Dynamo Theory and Closure Approach
• Magnetic diffusivity tensor and dynamo effects in rotating and shearing turbulence
• An Incoherent $\alpha -\Omega$ Dynamo in Accretion Disks
• Generation of Magnetic Field by Combined Action of Turbulence and Shear
• Resistivity-driven State Changes in Vertically Stratified Accretion Disks
• Mach number dependence of the onset of dynamo action
• On Self-Sustained Dynamo Cycles in Accretion Discs
• Large-Scale Magnetic-Field Generation by Randomly Forced Shearing Waves
• Periodic magnetorotational dynamo action as a prototype of nonlinear magnetic field generation in shear flows
• Large scale dynamo action precedes turbulence in shearing box simulations of the magnetorotational instability
• Electromotive force due to magnetohydrodynamic fluctuations in sheared rotating turbulence
• Nonlinear transverse cascade and sustenance of MRI-turbulence in Keplerian disks with an azimuthal magnetic field
• Active modes and dynamical balances in MRI-turbulence of Keplerian disks with a net vertical magnetic field
• Radially Dependent Large Scale Dynamos in Global Cylindrical Shear Flows and the Local Cartesian Limit
• Coupling of Damped and Growing Modes in Unstable Shear Flow
• Structure formation in turbulence as instability of effective quantum plasma
• The Magnetorotational Instability Prefers Three Dimensions
• Evolution of the magnetorotational instability on initially tangled magnetic fields