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arXiv 1702.06014math.AP
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具有质量传递和趋化性的热力学一致的Navier--Stokes--Cahn--Hilliard模型

Thermodynamically Consistent Navier--Stokes--Cahn--Hilliard Models with Mass Transfer and Chemotaxis

Kei Fong Lam, Hao Wu

AI总结:

本文推导了一类热力学一致、基于体积平均速度且耦合趋化性与质量传递的Navier--Stokes--Cahn--Hilliard两相流模型,并证明了其简化变体在二维和三维下的全局弱解存在性及二维下的全局强适定性。

摘要:

我们推导了一类Navier--Stokes--Cahn--Hilliard系统,该系统对具有质量传递的两相流与趋化过程耦合进行建模。这些热力学一致的模型可视为先前为肿瘤生长建模提出的Cahn--Hilliard--Darcy模型在Navier--Stokes下的自然类比,并且是基于体积平均速度推导的。然后,我们对总质量零过剩和密度相等的简化模型变体进行数学分析。我们在二维和三维中针对给定的质量传递项建立了全局弱解的存在性。在额外假设下,我们证明了在具有可变流体黏度和迁移率的二维情形下的全局强适定性,其中还包括化学势和序参数在强范数下对初始数据和质量传递项的连续依赖性。

英文摘要:

We derive a class of Navier--Stokes--Cahn--Hilliard systems that models two-phase flows with mass transfer coupled to the process of chemotaxis. These thermodynamically consistent models can be seen as the natural Navier--Stokes analogues of earlier Cahn--Hilliard--Darcy models proposed for modeling tumor growth, and are derived based on a volume-averaged velocity. Then we perform mathematical analysis on the simplified model variant with zero excess of total mass and equal densities. We establish the existence of global weak solutions in two and three dimensions for prescribed mass transfer terms. Under additional assumptions, we prove the global strong well-posedness in two dimensions with variable fluid viscosity and mobilities, which also includes a continuous dependence on initial data and mass transfer terms for the chemical potential and the order parameter in strong norms.

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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