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arXiv 1303.6446math.AP
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具有非局部相互作用和非常数迁移率的两相不可压缩流的扩散界面模型

A diffuse interface model for two-phase incompressible flows with nonlocal interactions and nonconstant mobility

Sergio Frigeri, Maurizio Grasselli, Elisabetta Rocca

摘要:

本文考虑了两种不互溶流体的等温不可压缩混合物的扩散界面模型。该模式由Navier-Stokes方程组和具有非常数迁移率的对流非局部Cahn-Hilliard方程耦合而成。我们首先证明了在非退化迁移率和多项式增长的正则势的情况下整体弱解的存在性。然后,我们将结果推广到简并迁移率和奇异(如对数)的潜力。在后一种情况下,我们也建立了二维的整体吸引子的存在性。利用类似的技巧,我们证明了具有退化迁移率和奇异势的三维对流非局部Cahn-Hilliard方程存在整体吸引子。

英文摘要:

We consider a diffuse interface model for incompressible isothermal mixtures of two immiscible fluids with matched constant densities. This model consists of the Navier-Stokes system coupled with a convective nonlocal Cahn-Hilliard equation with non-constant mobility. We first prove the existence of a global weak solution in the case of non-degenerate mobilities and regular potentials of polynomial growth. Then we extend the result to degenerate mobilities and singular (e.g. logarithmic) potentials. In the latter case we also establish the existence of the global attractor in dimension two. Using a similar technique, we show that there is a global attractor for the convective nonlocal Cahn-Hilliard equation with degenerate mobility and singular potential in dimension three.

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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