Acta mathematica scientia,Series A ›› 2026, Vol. 46 ›› Issue (5): 1667-1684.

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The Zero Parameter Limit for 3D Nonhomogeneous Incompressible MHD Equations with Boundary

Pengfei Chen*(), Qinghan Chen()   

  1. National Center for Applied Mathematics in Hunan, Hunan Key Laboratory for Computation and Simulation in Science and Engineering, Key Laboratory of Intelligent Computing and Information Processing of Ministry of Education, School of Mathematics and Computational Science, Xiangtan University, Hunan Xiangtan 411100
  • Received:2024-08-20 Revised:2025-04-20 Online:2026-10-26 Published:2026-09-07
  • Contact: Pengfei Chen E-mail:cpf@xtu.edu.cn;hnqhchen@163.com
  • Supported by:
    NSFC(12371211);NSFC(11771300)

Abstract:

This paper concerns the zero parameter limit problem for the 3-dimensional nonhomogeneous incompressible magnetohydrodynamic equations with physical boundary conditions. In presence of the boundary, the velocity field and the magnetic field fulfill the vorticity-slip and the perfect insulating condition, respectively. We establish a global in time weak solution for the initial-boundary-value problem in general smooth bounded domain. Moreover, for a flat domain, the additional initial boundary condition $\nabla\rho_0\cdot n=0$ plays a very important role in the improving the regularity of the boundary condition and the proof of uniform regularity of the local strong solution. As the viscosity and magnetic dissipation tend to zero, we establish the higher-order convergence estimate with a rate in sense of $W^{2,p}(\Omega)$.

Key words: nonhomogeneous incompressible MHD equations, the zero parameter limit, boundary conditions

CLC Number: 

  • O175.2
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