数学物理学报(英文版) ›› 2022, Vol. 42 ›› Issue (5): 1921-1946.doi: 10.1007/s10473-022-0512-2

• 论文 • 上一篇    

LARGE TIME BEHAVIOR OF GLOBAL STRONG SOLUTIONS TO A TWO-PHASE MODEL WITH A MAGNETIC FIELD

Wenjun WANG, Zhen CHENG   

  1. College of Science, University of Shanghai for Science and Technology, Shanghai, 200093, China
  • 收稿日期:2021-02-23 修回日期:2022-05-30 发布日期:2022-11-02
  • 通讯作者: Wenjun Wang,E-mail:wwj001373@hotmail.com E-mail:wwj001373@hotmail.com
  • 基金资助:
    The first author was supported by the National Natural Science Foundation of China (11871341 and 12071152).

LARGE TIME BEHAVIOR OF GLOBAL STRONG SOLUTIONS TO A TWO-PHASE MODEL WITH A MAGNETIC FIELD

Wenjun WANG, Zhen CHENG   

  1. College of Science, University of Shanghai for Science and Technology, Shanghai, 200093, China
  • Received:2021-02-23 Revised:2022-05-30 Published:2022-11-02
  • Contact: Wenjun Wang,E-mail:wwj001373@hotmail.com E-mail:wwj001373@hotmail.com
  • Supported by:
    The first author was supported by the National Natural Science Foundation of China (11871341 and 12071152).

摘要: In this paper, the Cauchy problem for a two-phase model with a magnetic field in three dimensions is considered. Based on a new linearized system with respect to (c - c, P - P, u, H) for constants c ≥ 0 and P > 0, the existence theory of global strong solution is established when the initial data is close to its equilibrium in three dimensions for the small H2 initial data. We improve the existence results obtained by Wen and Zhu in [40] where an additional assumption that the initial perturbations are bounded in L1-norm was needed. The energy method combined with the low-frequency and high-frequency decomposition is used to derive the decay of the solution and hence the global existence. As a by-product, the time decay estimates of the solution and its derivatives in the L2-norm are obtained.

关键词: two-phase model, magnetic field, strong solution, global existence, decay rates

Abstract: In this paper, the Cauchy problem for a two-phase model with a magnetic field in three dimensions is considered. Based on a new linearized system with respect to (c - c, P - P, u, H) for constants c ≥ 0 and P > 0, the existence theory of global strong solution is established when the initial data is close to its equilibrium in three dimensions for the small H2 initial data. We improve the existence results obtained by Wen and Zhu in [40] where an additional assumption that the initial perturbations are bounded in L1-norm was needed. The energy method combined with the low-frequency and high-frequency decomposition is used to derive the decay of the solution and hence the global existence. As a by-product, the time decay estimates of the solution and its derivatives in the L2-norm are obtained.

Key words: two-phase model, magnetic field, strong solution, global existence, decay rates

中图分类号: 

  • 76T10