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arXiv 1202.2391math.APmath.DS
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无界区域上随机Navier-斯托克斯方程的周期随机吸引子

Periodic Random Attractors for Stochastic Navier-Stokes Equations on Unbounded Domains

Bixiang Wang

摘要:

研究了无界区域上具有非自治确定项和随机项的二维Navier-斯托克斯方程解的渐近性态。我们首先引入一个连续的上循环,然后证明了回火随机吸引子的存在性和唯一性。我们还用完全解刻画了随机吸引子的结构。当确定性强迫项是周期的,我们表明,回火随机吸引子也是周期的。由于无界区域上的Sobolev嵌入不是紧的,我们利用Ball关于能量方程的思想建立了解的拉回渐近紧性。

英文摘要:

This paper is concerned with the asymptotic behavior of solutions of the two-dimensional Navier-Stokes equations with both non-autonomous deterministic and stochastic terms defined on unbounded domains. We first introduce a continuous cocycle for the equations and then prove the existence and uniqueness of tempered random attractors. We also characterize the structures of the random attractors by complete solutions. When deterministic forcing terms are periodic, we show that the tempered random attractors are also periodic. Since the Sobolev embeddings on unbounded domains are not compact, we establish the pullback asymptotic compactness of solutions by Ball's idea of energy equations.

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