Acta mathematica scientia,Series B ›› 2024, Vol. 44 ›› Issue (1): 234-246.doi: 10.1007/s10473-024-0113-3

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CONVEXITY OF THE FREE BOUNDARY FOR AN AXISYMMETRIC INCOMPRESSIBLE IMPINGING JET*

Xiaohui Wang   

  1. College of Mathematics and Physics, and Geomathematics Key Laboratory of Sichuan Province, Chengdu University of Technology, Chengdu 610059, China
  • Received:2022-08-20 Revised:2023-08-04 Online:2024-02-25 Published:2024-02-27
  • About author:Xiaohui Wang, E-mail: xiaohuiwang1@126.com
  • Supported by:
    National Natural Science Foundation of China (12101088), and the Natural Science Foundation of Sichuan Province (2022NSFSC1858).

Abstract: This paper is devoted to the study of the shape of the free boundary for a three-dimensional axisymmetric incompressible impinging jet. To be more precise, we will show that the free boundary is convex to the fluid, provided that the uneven ground is concave to the fluid.

Key words: Euler system, axisymmetric impinging jet, incompressible, free boundary, convexity

CLC Number: 

  • 35Q31
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