Acta mathematica scientia,Series B ›› 2025, Vol. 45 ›› Issue (6): 2591-2606.doi: 10.1007/s10473-025-0612-x

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EXISTENCE OF LARGE BOUNDARY LAYER SOLUTIONS TO INFLOW PROBLEM OF 1D FULL COMPRESSIBLE NAVIER-STOKES EQUATIONS

Yi WANG1,2,*, Yongfu YANG3, Qiuyang YU4,5   

  1. 1. State Key Laboratory of Mathematical Sciences and Institute of Applied Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China;
    2. School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
    3. School of Mathematics, Hohai University, Nanjing 211100, China;
    4. Institute of Applied Mathematics, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China;
    5. School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2025-03-24 Revised:2025-04-16 Online:2025-11-25 Published:2025-11-14
  • Contact: *Yi WANG, E-mail: wangyi@amss.ac.cn
  • About author:Yongfu YANG, E-mail: yyang@hhu.edu.cn; Qiuyang YU, E-mail: yuqiuyang@amss.ac.cn
  • Supported by:
    NSFC (12171459, 12288201, 12090014, 12421001) and CAS Project for Young Scientists in Basic Research (YSBR-031).

Abstract: We present the existence/non-existence criteria for large-amplitude boundary layer solutions to the inflow problem of the one-dimensional (1D) full compressible Navier-Stokes equations on a half line $\mathbb{R}_+$. Instead of the classical center manifold approach for the existence of small-amplitude boundary layer solutions in the previous results, the delicate global phase plane analysis, based on the qualitative theory of ODEs, is utilized to obtain the sufficient and necessary conditions for the existence/non-existence of large boundary layer solutions to the half-space inflow problem when the right end state belongs to the supersonic, transonic, and subsonic regions, respectively, which completely answers the existence/non-existence of boundary layer solutions to the half-space inflow problem of 1D full compressible Navier-Stokes equations.

Key words: compressible Navier-Stokes equations, inow problem, large-amplitude bound-ary layer solutions

CLC Number: 

  • 76N06
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