Phase field modelling of surfactants in multi-phase flow

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2018-10-29 DOI:10.4171/ifb/429

Oliver R. A. Dunbar, K. F. Lam, B. Stinner

引用次数: 7

Abstract

A diffuse interface model for surfactants in multi-phase flow with three or more fluids is derived. A system of Cahn-Hilliard equations is coupled with a Navier-Stokes system and an advection-diffusion equation for the surfactant ensuring thermodynamic consistency. By an asymptotic analysis the model can be related to a moving boundary problem in the sharp interface limit, which is derived from first principles. Results from numerical simulations support the theoretical findings. The main novelties are centred around the conditions in the triple junctions where three fluids meet. Specifically the case of local chemical equilibrium with respect to the surfactant is considered, which allows for interfacial surfactant flow through the triple junctions.

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多相流中表面活性剂的相场模拟

建立了表面活性剂在三种或三种以上流体的多相流中的扩散界面模型。将Cahn-Hilliard方程组与Navier-Stokes方程组和表面活性剂的平流-扩散方程耦合，以保证热力学一致性。通过渐近分析，该模型可与由第一原理导出的尖锐界面极限下的移动边界问题联系起来。数值模拟结果支持理论研究结果。主要的新颖之处集中在三种流体相遇的三重连接处。具体来说，考虑了表面活性剂局部化学平衡的情况，它允许界面表面活性剂通过三结流动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.