Acta mathematica scientia,Series B ›› 2020, Vol. 40 ›› Issue (6): 1627-1652.doi: 10.1007/s10473-020-0602-y

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ASYMPTOTIC STABILITY OF A BOUNDARY LAYER AND RAREFACTION WAVE FOR THE OUTFLOW PROBLEM OF THE HEAT-CONDUCTIVE IDEAL GAS WITHOUT VISCOSITY

Lili FAN1, Meichen HOU2   

  1. 1. School of Mathematics and Computer Science, Wuhan Polytechnic University, Wuhan 430023, China;
    2. School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-10-07 Revised:2020-07-31 Online:2020-12-25 Published:2020-12-30
  • Supported by:
    This work was supported by the Fundamental Research grants from the Science Foundation of Hubei Province (2018CFB693). The research of L.L.Fan was supported by the Natural Science Foundation of China (11871388) and in part by the Natural Science Foundation of China (11701439).

Abstract: This article is devoted to studying the initial-boundary value problem for an ideal polytropic model of non-viscous and compressible gas. We focus our attention on the outflow problem when the flow velocity on the boundary is negative and give a rigorous proof of the asymptotic stability of both the degenerate boundary layer and its superposition with the 3-rarefaction wave under some smallness conditions. New weighted energy estimates are introduced, and the trace of the density and velocity on the boundary are handled by some subtle analysis. The decay properties of the boundary layer and the smooth rarefaction wave also play an important role.

Key words: non-viscous, degenerate boundary layer, rarefaction wave, outflow problem

CLC Number: 

  • 35B35
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