数学物理学报(英文版) ›› 2020, Vol. 40 ›› Issue (5): 1229-1239.doi: 10.1007/s10473-020-0505-y

• 论文 • 上一篇    下一篇

THE EXISTENCE OF A BOUNDED INVARIANT REGION FOR COMPRESSIBLE EULER EQUATIONS IN DIFFERENT GAS STATES

蒋伟峰1, 王振2   

  1. 1. College of Science, China Jiliang University, Hangzhou 310018, China;
    2. College of Science, Wuhan University of Technology, Wuhan 430071, China
  • 收稿日期:2019-08-24 修回日期:2020-05-13 出版日期:2020-10-25 发布日期:2020-11-04
  • 通讯作者: Zhen WANG E-mail:zwang@whut.edu.cn
  • 作者简介:Weifeng JIANG,E-mail:casujiang89@gmail.com
  • 基金资助:
    The first author was supported by the Natural Science Foundation of Zhejiang (LQ18A010004), the second author was supported by the Fundamental Research Funds for the Central Universities (WUT: 2020IB011).

THE EXISTENCE OF A BOUNDED INVARIANT REGION FOR COMPRESSIBLE EULER EQUATIONS IN DIFFERENT GAS STATES

Weifeng JIANG1, Zhen WANG2   

  1. 1. College of Science, China Jiliang University, Hangzhou 310018, China;
    2. College of Science, Wuhan University of Technology, Wuhan 430071, China
  • Received:2019-08-24 Revised:2020-05-13 Online:2020-10-25 Published:2020-11-04
  • Contact: Zhen WANG E-mail:zwang@whut.edu.cn
  • Supported by:
    The first author was supported by the Natural Science Foundation of Zhejiang (LQ18A010004), the second author was supported by the Fundamental Research Funds for the Central Universities (WUT: 2020IB011).

摘要: In this article, by the mean-integral of the conserved quantity, we prove that the one-dimensional non-isentropic gas dynamic equations in an ideal gas state do not possess a bounded invariant region. Moreover, we obtain a necessary condition on the state equations for the existence of an invariant region for a non-isentropic process. Finally, we provide a mathematical example showing that with a special state equation, a bounded invariant region for the non-isentropic process may exist.

关键词: Euler equations, gas dynamic, non-isentropic, existence of invariant region

Abstract: In this article, by the mean-integral of the conserved quantity, we prove that the one-dimensional non-isentropic gas dynamic equations in an ideal gas state do not possess a bounded invariant region. Moreover, we obtain a necessary condition on the state equations for the existence of an invariant region for a non-isentropic process. Finally, we provide a mathematical example showing that with a special state equation, a bounded invariant region for the non-isentropic process may exist.

Key words: Euler equations, gas dynamic, non-isentropic, existence of invariant region

中图分类号: 

  • 35L65