arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.08125math.AP
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关于Boussinesq方程的增强耗散

On Enhanced Dissipation for the Boussinesq Equations

Christian Zillinger

摘要:

本文研究了二维Boussinesq方程在包含Couette流和流体静力平衡的两参数定态解族附近的稳定性和阻尼问题。在第一部分中,我们证明了对于无限周期信道中的线性化问题,如果任何扩散系数非零,则演化是渐近稳定的。特别地,这施加了比例如垂直扩散更弱的条件。此外,我们还研究了剪切流、静水平衡和部分耗散的相互作用。在第二部分中,我们采用Bedrossian,Vicol和Wang在Navier-Stokes问题中使用的方法,并将其与Boussinesq方程的抵消特性相结合,以建立小数据稳定性和增强耗散结果的非线性Boussinesq问题与全耗散。

英文摘要:

In this article we consider the stability and damping problem for the 2D Boussinesq equations with partial dissipation near a two parameter family of stationary solutions which includes Couette flow and hydrostatic balance. In the first part we show that for the linearized problem in an infinite periodic channel the evolution is asymptotically stable if any diffusion coefficient is non-zero. In particular, this imposes weaker conditions than for example vertical diffusion. Furthermore, we study the interaction of shear flow, hydrostatic balance and partial dissipation. In a second part we adapt the methods used by Bedrossian, Vicol and Wang in the Navier-Stokes problem and combine them with cancellation properties of the Boussinesq equations to establish small data stability and enhanced dissipation results for the nonlinear Boussinesq problem with full dissipation.

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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