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Title: Computational extended magneto-hydrodynamical study of shock structure generated by flows past an obstacle

The magnetized shock problem is studied in the context where supersonic plasma flows past a solid obstacle. This problem exhibits interesting and important phenomena such as a bow shock, magnetotail formation, reconnection, and plasmoid formation. This study is carried out using a discontinuous Galerkin method to solve an extended magneto-hydrodynamic model (XMHD). The main goals of this paper are to present a reasonably complete picture of the properties of this interaction using the MHD model and then to compare the results to the XMHD model. The inflow parameters, such as the magnetosonic Mach number M{sub f} and the ratio of thermal pressure to magnetic pressure β, can significantly affect the physical structures of the flow-obstacle interaction. The Hall effect can also significantly influence the results in the regime in which the ion inertial length is numerically resolved. Most of the results presented are for the two-dimensional case; however, two three-dimensional simulations are presented to make a connection to the important case in which the solar wind interacts with a solid body and to explore the possibility of performing scaled laboratory experiments.
Authors:
 [1] ;  [2]
  1. Cylance, Inc., Irvine, CA 92618 (United States)
  2. Laboratory of Plasma Studies, Cornell University, New York 14853 (United States)
Publication Date:
OSTI Identifier:
22489998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 7; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HALL EFFECT; MACH NUMBER; MAGNETOHYDRODYNAMICS; MAGNETOTAIL; PLASMA; SHOCK WAVES; SOLAR WIND; SOLIDS; SUPERSONIC FLOW; THREE-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL CALCULATIONS