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arXiv 1206.4502math.AP
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正压可压缩Navier-斯托克斯方程中速度的大时间行为的注记

A Note on Large Time Behavior of Velocity in the Baratropic Compressible Navier-Stokes Equations

Fei Jiang

摘要:

最近,对于初始密度为零的周期初值,Huang和Li [1]建立了二维可压缩Navier{斯托克斯方程在体粘滞系数λ= ρ^β且β> 4/3的条件下的整体强解和弱解的存在性.此外,还得到了强解和弱解的大时间性态,其中速度梯度在L^2范数下强收敛到零.本文进一步指出,该速度在H^1范数下强收敛于一个平衡速度,其中平衡速度是由初始数据唯一确定的。我们的结果也可以看作是对文献[2]中速度大时间行为结果的修正。

英文摘要:

Recently, for periodic initial data with initial density allowed to vanish, Huang and Li [1] establish the global existence of strong and weak solutions for the two-dimensional compressible Navier{Stokes equations with no restrictions on the size of initial data provided the bulk viscosity coefficient is λ= ρ^βwith β> 4/3. Moreover, the large-time behavior of the strong and weak solutions are also obtained, in which the velocity gradient strongly converges to zero in L^2 norm. In this note, we further point out that the velocity strongly converges to an equilibrium velocity in H^1 norm, in which the equilibrium velocity is uniquely determined by the initial data. Our result can also be regarded a correction for the result of large-time behavior of velocity in [2].

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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