论文标题

内部重力波的近临界反射的线性边界层分析,其粘度和扩散率不同

Linear boundary layer analysis of the near-critical reflection of internal gravity waves with different sizes of viscosity and diffusivity

论文作者

Bianchini, Roberta, Orrù, Gianluca

论文摘要

这项工作的目的是在更一般和现实的环境中迈出进一步的一步,以理解内部重力波的近乎临界反射,粘度$ν$和扩散性$κ$的大小不同。特别是,我们提供了边界层(边界层波数据包)衰变和大小的系统表征,具体取决于粘度和扩散性的数量级。在Dauxois \&Young JFM 1999的缩放假设下,我们可以为线性近临界反射问题构建$ l^2 $稳定的近似解决方案,在临界参数方面,扩散性的粘度都可以满足精确的缩放定律。

The aim of this work is to make a further step towards the understanding of the near-critical reflection of internal gravity waves from a slope in the more general and realistic context where the size of viscosity $ν$ and the size of diffusivity $κ$ are different. In particular, we provide a systematic characterization of boundary layers (boundary layer wave packets) decays and sizes depending on the order of magnitude of viscosity and diffusivity. We can construct an $L^2$ stable approximate solution to the linear near-critical reflection problem under the scaling assumption of Dauxois \& Young JFM 1999, where either viscosity of diffusivity satisfies a precise scaling law in terms of the criticality parameter.

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