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一类修正的Navier-Stokes方程的长时间性态

董柏青; 李用声   

  1. 南开大学数学科学学院 天津 300071
  • 收稿日期:2005-01-20 修回日期:2006-01-08 出版日期:2006-08-25 发布日期:2006-08-25
  • 通讯作者: 董柏青
  • 基金资助:
    国家自然科学基金(10001013, 10471047)资助

Large Time Behavior of the Modified Navier-Stokes Equations

Dong Boqing; Li Yongsheng   

  1. School of Mathematics Sciences, Nankai University, Tianjin 300071
  • Received:2005-01-20 Revised:2006-01-08 Online:2006-08-25 Published:2006-08-25
  • Contact: Dong Boqing

摘要: 该文主要讨论,Rn上一类修正的 Navier-Stokes 方程弱解的长时间性态, 通过进一步改进Fourier分解方法, 得到了当初速度u0∈ L2L1时其弱解在L2 范数下的最优衰减率为 (1+t)n/4 同时该文也给出了修正的Navier-Stokes 方程与经典Navier-Stokes 方程的误差估计.

关键词: 衰减率, Fourier分解, Navier-Stokes 方程

Abstract: This paper is concerned with the large time behavior of the modified Navier-Stokes equations in Rn . By improving the Fourier splitting methods, it is proved that the weak solution decays in L2 norm at the rate (1+t)n/4 when the initial data u0∈ L2∩L1. Moreover, the error estimate between modified Navier-Stokes equations and classic Navier-Stokes equations is studied.

Key words: Decay rate, Fourier splitting, Navier-Stokes equations.

中图分类号: 

  • 35Q35