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arXiv 2407.14941math.AP
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密度不同的演化曲面上两相流的扩散界面模型:局部适定性

Diffuse Interface Model for Two-Phase Flows on Evolving Surfaces with Different Densities: Local Well-Posedness

Faculty of Mathematics, University of Vienna(维也纳大学数学学院)

Helmut Abels, Harald Garcke, Andrea Poiatti

AI总结:

本文推导了密度不匹配的演化曲面上两相流的Cahn-Hilliard-Navier-Stokes系统,在预设曲面演化下证明了强解的短时适定性及分离性质,通过拉回、线性化和压缩映射等方法解决了正则性问题。

摘要:

本文利用理性热力学方法推导了密度不匹配的演化曲面上两相流的Cahn-Hilliard-Navier-Stokes系统。在预设曲面演化的假设下,针对具有奇异(对数)势的Cahn-Hilliard能量,证明了强解的短时适定性及分离性质。通过将问题拉回到初始曲面重新表述,对拉回系统采用合适的线性化和压缩映射论证。处理线性化系统时,需证明变粘度下曲面Stokes算子的极大L²正则性,以及线性化Cahn-Hilliard系统的极大L^p正则性。

英文摘要:

A Cahn-Hilliard-Navier-Stokes system for two-phase flow on an evolving surface with non-matched densities is derived using methods from rational thermodynamics. For a Cahn-Hilliard energy with a singular (logarithmic) potential short time well-posedness of strong solutions together with a separation property is shown, under the assumption of a priori prescribed surface evolution. The problem is reformulated with the help of a pullback to the initial surface. Then a suitable linearization and a contraction mapping argument for the pullback system are used. In order to deal with the linearized system, it is necessary to show maximal $L^2$-regularity for the surface Stokes operator in the case of variable viscosity and to obtain maximal $L^p$-regularity for the linearized Cahn-Hilliard system.

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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