Acta mathematica scientia,Series B ›› 2020, Vol. 40 ›› Issue (5): 1229-1239.doi: 10.1007/s10473-020-0505-y

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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).

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

CLC Number: 

  • 35L65
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