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arXiv 0906.0839math.AP
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具有自由表面的两流体系统内波的渐近浅水模型

Asymptotic shallow water models for internal waves in a two-fluid system with a free surface

Vincent Duchene

摘要:

在本文中,我们推导出渐近模型的二维和三维重力波的传播在自由表面和不同密度的不混溶流体的两层之间的界面,在一个不均匀的底部。我们假设上层和下层流体的厚度大小相当,并且与系统的特征波长(浅水区)相比很小。根据博纳,Lannes和Saut介绍的方法的基础上所涉及的狄利克雷到诺依曼算子的扩展,我们能够给出一个严格的理由的经典模型的弱和强非线性波,以及有趣的新的。特别是,我们推导出线性适定系统在所谓的Boussinesq/Boussinesq制度。此外,我们建立了完整的欧拉方程组与这些模型的相容性,并推导出解的收敛性。

英文摘要:

In this paper, we derive asymptotic models for the propagation of two and three-dimensional gravity waves at the free surface and the interface between two layers of immiscible fluids of different densities, over an uneven bottom. We assume the thickness of the upper and lower fluids to be of comparable size, and small compared to the characteristic wavelength of the system (shallow water regimes). Following a method introduced by Bona, Lannes and Saut based on the expansion of the involved Dirichlet-to-Neumann operators, we are able to give a rigorous justification of classical models for weakly and strongly nonlinear waves, as well as interesting new ones. In particular, we derive linearly well-posed systems in the so called Boussinesq/Boussinesq regime. Furthermore, we establish the consistency of the full Euler system with these models, and deduce the convergence of the solutions.

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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