Acta mathematica scientia,Series A ›› 2024, Vol. 44 ›› Issue (6): 1445-1475.

Previous Articles     Next Articles

The Existence of Global Strong Solution to the Compressible Axisymmetric Navier-Stokes Equations with Density-Dependent Viscosities

Gong Simeng2(),Zhang Xueyao1,*(),Guo Zhenhua1,2()   

  1. 1School of Mathematics and CNS, Northwest University, Xi'an 710127
    2School of Mathematics and Information Science, Guangxi University, Nan'ning 530004
  • Received:2024-01-09 Revised:2024-07-31 Online:2024-12-26 Published:2024-11-22
  • Supported by:
    NSFC(11931013);GXNSF(2022GXNSFDA035078)

Abstract:

In this paper, we consider the compressible Navier-Stokes equations with viscous-dependent density in 3D space, and obtain a global axisymmetric strong solution with small energy and large initial oscillations in a periodic domain $\Omega=\{(r,z)\vert r=\sqrt{x^2+y^2},(x,y,z)\in\mathbb{R}^3,r\in I\subset(0,+\infty),z\in(-\infty,+\infty)\}$. When $z\rightarrow\pm\infty$, the initial density remains in a non-vacuum state. The results also show that as long as the initial density is far away from the vacuum, the solution will not develop the vacuum state in any time. And the exact decay rates of the solution is obtained.

Key words: Navier-Stokes equations, Axisymmetric, Density-dependent, Strong solution

CLC Number: 

  • 0175.23
Trendmd