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Title: TRANSITION FROM KINETIC TO MHD BEHAVIOR IN A COLLISIONLESS PLASMA

Abstract

The study of kinetic effects in heliospheric plasmas requires representation of dynamics at sub-proton scales, but in most cases the system is driven by magnetohydrodynamic (MHD) activity at larger scales. The latter requirement challenges available computational resources, which raises the question of how large such a system must be to exhibit MHD traits at large scales while kinetic behavior is accurately represented at small scales. Here we study this implied transition from kinetic to MHD-like behavior using particle-in-cell (PIC) simulations, initialized using an Orszag–Tang Vortex. The PIC code treats protons, as well as electrons, kinetically, and we address the question of interest by examining several different indicators of MHD-like behavior.

Authors:
; ; ;  [1]
  1. Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE (United States)
Publication Date:
OSTI Identifier:
22525334
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 811; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COLLISIONLESS PLASMA; COMPUTERIZED SIMULATION; HELIOSPHERE; MAGNETOHYDRODYNAMICS; SOLAR ELECTRONS; SOLAR PROTONS; SOLAR WIND; TURBULENCE; VORTICES

Citation Formats

Parashar, Tulasi N., Matthaeus, William H., Shay, Michael A., and Wan, Minping. TRANSITION FROM KINETIC TO MHD BEHAVIOR IN A COLLISIONLESS PLASMA. United States: N. p., 2015. Web. doi:10.1088/0004-637X/811/2/112.
Parashar, Tulasi N., Matthaeus, William H., Shay, Michael A., & Wan, Minping. TRANSITION FROM KINETIC TO MHD BEHAVIOR IN A COLLISIONLESS PLASMA. United States. doi:10.1088/0004-637X/811/2/112.
Parashar, Tulasi N., Matthaeus, William H., Shay, Michael A., and Wan, Minping. Thu . "TRANSITION FROM KINETIC TO MHD BEHAVIOR IN A COLLISIONLESS PLASMA". United States. doi:10.1088/0004-637X/811/2/112.
@article{osti_22525334,
title = {TRANSITION FROM KINETIC TO MHD BEHAVIOR IN A COLLISIONLESS PLASMA},
author = {Parashar, Tulasi N. and Matthaeus, William H. and Shay, Michael A. and Wan, Minping},
abstractNote = {The study of kinetic effects in heliospheric plasmas requires representation of dynamics at sub-proton scales, but in most cases the system is driven by magnetohydrodynamic (MHD) activity at larger scales. The latter requirement challenges available computational resources, which raises the question of how large such a system must be to exhibit MHD traits at large scales while kinetic behavior is accurately represented at small scales. Here we study this implied transition from kinetic to MHD-like behavior using particle-in-cell (PIC) simulations, initialized using an Orszag–Tang Vortex. The PIC code treats protons, as well as electrons, kinetically, and we address the question of interest by examining several different indicators of MHD-like behavior.},
doi = {10.1088/0004-637X/811/2/112},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 811,
place = {United States},
year = {2015},
month = {10}
}