Space-filter techniques for quasi-neutral hybrid-kinetic models
arXiv:2005.03130 · doi:10.1063/5.0012924
Abstract
The space-filter approach has proved a fundamental tool in studying turbulence in neutral fluids, providing the ability to analyze scale-to-scale energy transfer in configuration space. It is well known that turbulence in plasma presents challenges different from neutral fluids, especially when the scale of interests include kinetic effects. The space-filter approach is still largely unexplored for kinetic plasma. Here we derive the space-filtered (or, equivalently "coarse-grained") equations in configuration space for a quasi-neutral hybrid-kinetic plasma model, in which ions are fully kinetic and electrons are a neutralizing fluid. Different models and closures for the electron fluid are considered, including finite electron-inertia effects and full electrons' pressure-tensor dynamics. Implications for the cascade of turbulent fluctuations in real space depending on different approximations are discussed.
43 pages, 2 figures
References in corpus (24)
- Recent progress in astrophysical plasma turbulence from solar wind observations
- Nature of Kinetic Scale Turbulence in the Earth's Magnetosheath
- Magnetic reconnection as a driver for a sub-ion scale cascade in plasma turbulence
- Multiscale nature of the dissipation range in gyrokinetic simulations of Alfvénic turbulence
- Gyrokinetic turbulence: a nonlinear route to dissipation through phase space
- On the von Karman-Howarth equations for Hall MHD flows
- Collisionless Reconnection in Magnetohydrodynamic and Kinetic Turbulence
- Magnetosperic Multiscale (MMS) observation of plasma velocity-space cascade: Hermite representation and theory
- Hybrid-Kinetic Simulations of Ion Heating in Alfvénic Turbulence
- Magnetohydrodynamic turbulence mediated by reconnection
- Kinetic cascade in solar-wind turbulence: 3D3V hybrid-kinetic simulations with electron inertia
- Coherent structures at ion scales in fast solar wind: {\it Cluster} observations
- Fully kinetic versus reduced-kinetic modelling of collisionless plasma turbulence
- Differential kinetic dynamics and heating of ions in the turbulent solar wind
- Propinquity of current and vortex structures: effects on collisionless plasma heating
- The Structure of Plasma Heating in Gyrokinetic Alfvénic Turbulence
- Exact law for homogeneous compressible Hall magnetohydrodynamics turbulence
- The dissipation of solar wind turbulent fluctuations at electron scales
- Energy Dissipation in Magnetohydrodynamic Turbulence: Coherent Structures or "Nanoflares"?
- Kinetic plasma turbulence: recent insights and open questions from 3D3V simulations
- Magnetospheric Multiscale Observation of Kinetic Signatures in the Alfvén Vortex
- A solvable model of Vlasov-kinetic plasma turbulence in Fourier-Hermite phase space
- Neutral Vlasov kinetic theory of magnetized plasmas
- Collision-dependent power law scalings in 2D gyrokinetic turbulence