Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations

Plasma dynamics is a multi-scale problem that involves many spatial and temporal scales. Turbulence connects the disparate scales in this system through a cascade that is established by nonlinear interactions. Most astrophysical plasma systems are weakly collisional, making a fully kinetic Vlasov de...

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Autores principales: González, C.A., Parashar, T.N., Gomez, D., Matthaeus, W.H., Dmitruk, P.
Formato: JOUR
Materias:
Collisional plasmas
Electric fields
Electromagnetic fields
Plasma diagnostics
Plasma flow
Plasma theory
Two phase flow
Astrophysical plasma
Electron inertia
Kinetic modeling
Large-scale dynamics
Multiscale problem
Nonlinear interactions
Particle-in-cell model
Spatial and temporal scale
Kinetics
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1070664X_v26_n1_p_Gonzalez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_1070664X_v26_n1_p_Gonzalez
record_format dspace
spelling todo:paper_1070664X_v26_n1_p_Gonzalez2023-10-03T16:02:37Z Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations González, C.A. Parashar, T.N. Gomez, D. Matthaeus, W.H. Dmitruk, P. Collisional plasmas Electric fields Electromagnetic fields Plasma diagnostics Plasma flow Plasma theory Two phase flow Astrophysical plasma Electron inertia Kinetic modeling Large-scale dynamics Multiscale problem Nonlinear interactions Particle-in-cell model Spatial and temporal scale Kinetics Plasma dynamics is a multi-scale problem that involves many spatial and temporal scales. Turbulence connects the disparate scales in this system through a cascade that is established by nonlinear interactions. Most astrophysical plasma systems are weakly collisional, making a fully kinetic Vlasov description of the system essential. The use of reduced models to study such systems is computationally desirable, but careful benchmarking of physics in different models is needed. We perform one such comparison here between the fully kinetic Particle-In-Cell model and a two-fluid model that includes Hall physics and electron inertia, with a particular focus on the sub-proton scale electric field. We show that in general, the two fluid model captures large scale dynamics reasonably well. At smaller scales, the Hall physics is also captured reasonably well by the fluid code, but electron features show departures from the fully kinetic model. Implications for the use of such fluid models are discussed. © 2019 Author(s). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1070664X_v26_n1_p_Gonzalez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Collisional plasmas
Electric fields
Electromagnetic fields
Plasma diagnostics
Plasma flow
Plasma theory
Two phase flow
Astrophysical plasma
Electron inertia
Kinetic modeling
Large-scale dynamics
Multiscale problem
Nonlinear interactions
Particle-in-cell model
Spatial and temporal scale
Kinetics
spellingShingle Collisional plasmas
Electric fields
Electromagnetic fields
Plasma diagnostics
Plasma flow
Plasma theory
Two phase flow
Astrophysical plasma
Electron inertia
Kinetic modeling
Large-scale dynamics
Multiscale problem
Nonlinear interactions
Particle-in-cell model
Spatial and temporal scale
Kinetics
González, C.A.
Parashar, T.N.
Gomez, D.
Matthaeus, W.H.
Dmitruk, P.
Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations
topic_facet Collisional plasmas
Electric fields
Electromagnetic fields
Plasma diagnostics
Plasma flow
Plasma theory
Two phase flow
Astrophysical plasma
Electron inertia
Kinetic modeling
Large-scale dynamics
Multiscale problem
Nonlinear interactions
Particle-in-cell model
Spatial and temporal scale
Kinetics
description Plasma dynamics is a multi-scale problem that involves many spatial and temporal scales. Turbulence connects the disparate scales in this system through a cascade that is established by nonlinear interactions. Most astrophysical plasma systems are weakly collisional, making a fully kinetic Vlasov description of the system essential. The use of reduced models to study such systems is computationally desirable, but careful benchmarking of physics in different models is needed. We perform one such comparison here between the fully kinetic Particle-In-Cell model and a two-fluid model that includes Hall physics and electron inertia, with a particular focus on the sub-proton scale electric field. We show that in general, the two fluid model captures large scale dynamics reasonably well. At smaller scales, the Hall physics is also captured reasonably well by the fluid code, but electron features show departures from the fully kinetic model. Implications for the use of such fluid models are discussed. © 2019 Author(s).
format JOUR
author González, C.A.
Parashar, T.N.
Gomez, D.
Matthaeus, W.H.
Dmitruk, P.
author_facet González, C.A.
Parashar, T.N.
Gomez, D.
Matthaeus, W.H.
Dmitruk, P.
author_sort González, C.A.
title Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations
title_short Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations
title_full Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations
title_fullStr Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations
title_full_unstemmed Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations
title_sort turbulent electromagnetic fields at sub-proton scales: two-fluid and full-kinetic plasma simulations
url http://hdl.handle.net/20.500.12110/paper_1070664X_v26_n1_p_Gonzalez
work_keys_str_mv AT gonzalezca turbulentelectromagneticfieldsatsubprotonscalestwofluidandfullkineticplasmasimulations
AT parashartn turbulentelectromagneticfieldsatsubprotonscalestwofluidandfullkineticplasmasimulations
AT gomezd turbulentelectromagneticfieldsatsubprotonscalestwofluidandfullkineticplasmasimulations
AT matthaeuswh turbulentelectromagneticfieldsatsubprotonscalestwofluidandfullkineticplasmasimulations
AT dmitrukp turbulentelectromagneticfieldsatsubprotonscalestwofluidandfullkineticplasmasimulations
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