dorsal/arxiv
View SchemaKinetic Vlasov Simulations of collisionless magnetic Reconnection
| Authors | H. Schmitz, R. Grauer |
|---|---|
| Categories | |
| ArXiv ID | physics/0608175 |
| URL | https://arxiv.org/abs/physics/0608175 |
| DOI | 10.1063/1.2347101 |
Abstract
A fully kinetic Vlasov simulation of the Geospace Environment Modeling (GEM) Magnetic Reconnection Challenge is presented. Good agreement is found with previous kinetic simulations using particle in cell (PIC) codes, confirming both the PIC and the Vlasov code. In the latter the complete distribution functions $f_k$ ($k=i,e$) are discretised on a numerical grid in phase space. In contrast to PIC simulations, the Vlasov code does not suffer from numerical noise and allows a more detailed investigation of the distribution functions. The role of the different contributions of Ohm's law are compared by calculating each of the terms from the moments of the $f_k$. The important role of the off--diagonal elements of the electron pressure tensor could be confirmed. The inductive electric field at the X--Line is found to be dominated by the non--gyrotropic electron pressure, while the bulk electron inertia is of minor importance. Detailed analysis of the electron distribution function within the diffusion region reveals the kinetic origin of the non--gyrotropic terms.
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"abstract": "A fully kinetic Vlasov simulation of the Geospace Environment Modeling (GEM)\nMagnetic Reconnection Challenge is presented. Good agreement is found with\nprevious kinetic simulations using particle in cell (PIC) codes, confirming\nboth the PIC and the Vlasov code. In the latter the complete distribution\nfunctions $f_k$ ($k=i,e$) are discretised on a numerical grid in phase space.\nIn contrast to PIC simulations, the Vlasov code does not suffer from numerical\nnoise and allows a more detailed investigation of the distribution functions.\nThe role of the different contributions of Ohm\u0027s law are compared by\ncalculating each of the terms from the moments of the $f_k$. The important role\nof the off--diagonal elements of the electron pressure tensor could be\nconfirmed. The inductive electric field at the X--Line is found to be dominated\nby the non--gyrotropic electron pressure, while the bulk electron inertia is of\nminor importance. Detailed analysis of the electron distribution function\nwithin the diffusion region reveals the kinetic origin of the non--gyrotropic\nterms.",
"arxiv_id": "physics/0608175",
"authors": [
"H. Schmitz",
"R. Grauer"
],
"categories": [
"physics.plasm-ph",
"physics.comp-ph"
],
"doi": "10.1063/1.2347101",
"title": "Kinetic Vlasov Simulations of collisionless magnetic Reconnection",
"url": "https://arxiv.org/abs/physics/0608175"
},
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