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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2019
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v26_n1_p_Gonzalez http://hdl.handle.net/20.500.12110/paper_1070664X_v26_n1_p_Gonzalez |
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paper:paper_1070664X_v26_n1_p_Gonzalez2023-06-08T16:04:42Z Turbulent electromagnetic fields at sub-proton scales: Two-fluid and full-kinetic plasma simulations 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). 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v26_n1_p_Gonzalez 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 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). |
| 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 |
| publishDate |
2019 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1070664X_v26_n1_p_Gonzalez http://hdl.handle.net/20.500.12110/paper_1070664X_v26_n1_p_Gonzalez |
| _version_ |
1768543046987677696 |