数学物理学报(英文版) ›› 2015, Vol. 35 ›› Issue (4): 855-875.doi: 10.1016/S0252-9602(15)30025-4

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SIMPLE WAVES OF THE TWO DIMENSIONAL COMPRESSIBLE FULL EULER EQUATIONS

陈宇, 周忆   

  • 收稿日期:2015-02-04 出版日期:2015-07-01 发布日期:2015-07-01

SIMPLE WAVES OF THE TWO DIMENSIONAL COMPRESSIBLE FULL EULER EQUATIONS

Yu CHEN, Yi ZHOU   

  1. School of Mathematical Sciences, Fudan University, Shanghai 200433, China
  • Received:2015-02-04 Online:2015-07-01 Published:2015-07-01

摘要:

In this paper, we establish the existence of four families of simple wave solution for two dimensional compressible full Euler system in the self-similar plane. For the 2×2 quasilinear non-reducible hyperbolic system, there not necessarily exists any simple wave solution. We prove the result that there are simple wave solutions for this 4×4 non-reducible hyperbolic system, its simple wave flow is covered by four straight characteristics λ0=λ1,λ2,λ3 and the solutions keep constants along these lines. We also investigate the existence of simple wave solution for the isentropic relativistic hydrodynamic system in the self-similar plane.

关键词: simple waves, Euler equations, characteristic decomposition

Abstract:

In this paper, we establish the existence of four families of simple wave solution for two dimensional compressible full Euler system in the self-similar plane. For the 2×2 quasilinear non-reducible hyperbolic system, there not necessarily exists any simple wave solution. We prove the result that there are simple wave solutions for this 4×4 non-reducible hyperbolic system, its simple wave flow is covered by four straight characteristics λ0=λ1,λ2,λ3 and the solutions keep constants along these lines. We also investigate the existence of simple wave solution for the isentropic relativistic hydrodynamic system in the self-similar plane.

Key words: simple waves, Euler equations, characteristic decomposition

中图分类号: 

  • 35C06