RAY VELOCITY AND EXCEPTIONAL WAVES - A COVARIANT FORMULATION

被引:13
作者
BOILLAT, G
机构
[1] Département de Mathématiques, Université de Clermont, Clermont-Ferrand
关键词
D O I
10.1063/1.1664860
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In a nonlinear field an accelerated wave sooner or later turns into a shock. When this is not the case, the wave is exceptional (e.g., Alfvén waves of magnetohydrodynamics). Then the normal speed of the wave remains undisturbed. This criterion is given a convenient coveriant form in terms of the ray velocity. As an example a thermodynamical relativistic fluid is studied.
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页码:452 / &
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