Optimal Landau-type closure parameters for two-fluid simulations of plasma turbulence at kinetic scales

Abstract

Two fluid simulations using local Landau-fluid closures derived from linear theory provide an efficient computational framework for plasma modelling, since they bridge the gap between computationally intensive kinetic simulations and fluid descriptions. Their accuracy in representing kinetic effects depends critically on the validity of the linear approximation used in the derivation: the plasma should not be too far from local thermodynamic equilibrium, LTE. However, many of the problems where these models are of particular interest (such as plasma turbulence and instabilities) are in fact quite far from LTE. The question then arises, if kinetic scale processes are still sufficiently well captured outside of the theoretical regime of applicability of the closure. In this paper, we show that two fluid simulations with Landau fluid closures can effectively reproduce the energy spectra obtained with fully kinetic Vlasov simulations, used as references, as long as the local closure parameter is appropriately chosen. Our findings validate the usage of two fluid simulations with Landau-fluid closure as a possible alternative to fully kinetic simulations of turbulence, in cases where being able to simulate extremely large domains is of particular interest.

References in corpus (36)

• An Energy- and Charge-conserving, Implicit, Electrostatic Particle-in-Cell Algorithm
• The Energy Conserving Particle-in-Cell Method
• Shearing Box Simulations of the MRI in a Collisionless Plasma
• The role of three-dimensional transport in driving enhanced electron acceleration during magnetic reconnection
• Extended MHD modeling of the steady solar corona and the solar wind
• Global three-dimensional simulation of Earth's dayside reconnection using a two-way coupled magnetohydrodynamics with embedded particle-in-cell model: initial results
• Pressure anisotropy and small spatial scales induced by velocity shear
• Comparison of multi-fluid moment models with Particle-in-Cell simulations of collisionless magnetic reconnection
• Local 2D Particle-in-cell simulations of the collisionless MRI
• Data-driven discovery of reduced plasma physics models from fully-kinetic simulations
• Adaptive Mesh Refinement for Singular Current Sheets in Incompressible Magnetohydrodynamic Flows
• A semi-Lagrangian Vlasov solver in tensor train format
• Fully kinetic versus reduced-kinetic modelling of collisionless plasma turbulence
• Self-inhibiting thermal conduction in high-beta, whistler-unstable plasma
• Nonlinear evolution of the magnetized Kelvin-Helmholtz instability: from fluid to kinetic modeling
• Energy-conserving time propagation for a geometric particle-in-cell Vlasov--Maxwell solver
• Comparison of time splitting and backsubstitution methods for integrating Vlasov's equation with magnetic fields
• A Multi Level Multi Domain Method for Particle In Cell Plasma Simulations
• Studying dawn-dusk asymmetries of Mercury's magnetotail using MHD-EPIC simulations
• On the role of solar wind expansion as a source of whistler waves: scattering of suprathermal electrons and heat flux regulation in the inner heliosphere
• Two-way coupling of magnetohydrodynamic simulations with embedded particle-in-cell simulations
• An introductory guide to fluid models with anisotropic temperatures Part 2 -- Kinetic theory, Padé approximants and Landau fluid closures
• Multiple scale kinetic simulations with the energy conserving semi implicit particle in cell (PIC) method
• Temperature gradient driven heat flux closure in fluid simulations of collisionless reconnection
• Data-driven, multi-moment fluid modeling of Landau damping
• Machine-learning heat flux closure for multi-moment fluid modeling of nonlinear Landau damping
• In Search of a Data Driven Symbolic Multi-Fluid 10-Moment Model Closure
• Quantized tensor networks for solving the Vlasov-Maxwell equations
• Collisionless conduction in a high-beta plasma: a collision operator for whistler turbulence
• The muphyII Code: Multiphysics Plasma Simulation on Large HPC Systems
• An Energy Conserving Vlasov Solver That Tolerates Coarse Velocity Space Resolutions: Simulation of MMS Reconnection Events
• An Asymptotic-Preserving and Energy-Conserving Particle-In-Cell Method for Vlasov-Maxwell Equations
• Fluid Simulations of Three-Dimensional Reconnection that Capture the Lower-Hybrid Drift Instability
• Toward Realistic Solar Flare Models: An explicit Particle-In-Cell solver in the DISPATCH framework
• Quasi-parallel anti-sunward propagating whistler waves associated to the electron-deficit in the near-Sun solar wind: Particle-in-Cell simulation
• Electron neural closure for turbulent magnetosheath simulations: energy channels