Structure of fast shocks in the presence of heat conduction

Autor:	Ching-Ling Tsai, B. H. Wu, Hong-Hsiang Chen, Lou-Chuang Lee
Rok vydání:	2007
Předmět:	Shock wave Convection Physics Shock (fluid dynamics) Astrophysics::High Energy Astrophysical Phenomena Mechanics Condensed Matter Physics Thermal conduction Moving shock Foreshock Classical mechanics Heat flux Physics::Space Physics Oblique shock Astrophysics::Galaxy Astrophysics
Zdroj:	Physics of Plasmas. 14:122903
ISSN:	1089-7674 1070-664X
DOI:	10.1063/1.2819673
Popis:	There are three types of magnetohydrodynamic (MHD) shocks: the fast shock, intermediate shock, and slow shock. The structure of slow shocks and intermediate shocks in the presence of heat conduction has been studied earlier [C. L. Tsai, R. H. Tsai, B. H. Wu, and L. C. Lee, Phys. Plasmas 9, 1185 (2002); C. L. Tsai, B. H. Wu, and L. C. Lee, Phys. Plasmas 12, 82501 (2005)]. Based on one-dimensional MHD numerical simulations with a heat conduction term, the evolution and structure of fast shocks are studied. The fast shock will form a foreshock in the presence of heat conduction. The foreshock is formed due to the heat flow from downstream to upstream and located in the immediate upstream of the main shock. In the steady state, the value of diffusion velocity Vd in the foreshock is found to nearly equal the upstream convection velocity in the fast shock frame. It is found that the density jump across the main shock in high Mach number case can be much larger than 4 in the early simulation time. However the de...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d8e04d2ff60ed66e9847de3691e913a8 https://doi.org/10.1063/1.2819673 Zobrazit plný text záznamu