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arXiv 0810.3987math.APmath-phmath.MP
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粘性不可压缩流体两相流非经典锐界面模型弱解的存在性

Existence of weak solutions for a non-classical sharp interface model for a two-phase flow of viscous, incompressible fluids

Helmut Abels, Matthias Röger

摘要:

本文提出了一种新的适用于两种不可混溶、粘性、不可压缩流体流动的锐界面模型。在两相流的经典模型相比,我们规定的界面,考虑扩散效应的演变规律。这导致了一个耦合系统的Navier-Stokes和Mullins-Sekerka类型的部分,符合扩散界面模型的渐近极限。我们证明了经典两相模型弱解的长时间存在性,这是一个公开的问题。我们表明,相界面在几乎所有的点有一个广义中曲率。

英文摘要:

We introduce a new sharp interface model for the flow of two immiscible, viscous, incompressible fluids. In contrast to classical models for two-phase flows we prescribe an evolution law for the interfaces that takes diffusional effects into account. This leads to a coupled system of Navier-Stokes and Mullins-Sekerka type parts that coincides with the asymptotic limit of a diffuse interface model. We prove the long-time existence of weak solutions, which is an open problem for the classical two-phase model. We show that the phase interfaces have in almost all points a generalized mean curvature.

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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