Numerical simulation of slow shocks in the solar wind

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Title:	Numerical simulation of slow shocks in the solar wind
Authors:	Wu,CC;Chao,JK;Wu,ST;Dryer,M
Contributors:	太空科學研究所
Keywords:	INTERPLANETARY SPACE;WAVES;1-AU;SUN;AU
Date:	1996
Issue Date:	2010-06-29 18:39:48 (UTC+8)
Publisher:	中央大學
Abstract:	The evolutionary state of slow forward shock waves is examined with the use of two MHD numerical codes. Our study is intended to be exploratory rather than a detailed parametric one. The first code is one-dimensional (with three components of velocity and magnetic field) which is used to follow a slow shock that propagates into a positive gradient of density versus distance. It is found that the slow shock evolves into an extraneous (intermediate) shock wave. The second code has a spherical, one-dimensional, planar geometry (with two velocity and magnetic field components) which is used to follow a spiral interplanetary magnetic field. It is found that a slow shock type perturbation can generate a forward slow shock; a fast forward shock is generated in the front of the slow shock; a contact discontinuity is formed behind the slow shock, and a compound nonlinear MHD wave is formed behind the contact discontinuity with a fast reverse shock formed further behind. Thus, we demonstrate that the evolution of a slow shock into (solely) a fast shock, as suggested by Whang (1987), is much more complicated.
Relation:	SOLAR PHYSICS
Appears in Collections:	[Graduate Institute of Space Science] journal & Dissertation

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