移动接触线问题的增强型保守相场法

IF 1.7 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS International Journal for Numerical Methods in Fluids Pub Date : 2024-03-26 DOI:10.1002/fld.5286
Mingguang Shen, Ben Q. Li
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引用次数: 0

摘要

传统的 Allen-Cahn 相场模型不保质,主要用于凝固微结构的形成。然而,最近一种改进的 Allen-Cahn 相场模型引起了学术界的关注。它是通过从平动 Allen-Cahn 相场模型中减去曲率驱动的流动项而得到的,因此改善了相场的约束性。最近,该模型利用恢复的带符号距离函数进一步完善,以计算界面法向量。本文以上述 Allen-Cahn 相场模型为基础,建立了一个三维相场模型。该模型采用有限差分法在半交错网格上离散化。更重要的是,界面张力以潜在形式表示。该模型经过了大量的测试,并应用于各种条件下的撞击。此外,还使用共享内存并行性 OpenMP 对模型进行了并行化处理,以方便计算。
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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Enhanced conservative phase field method for moving contact line problems

The traditional Allen–Cahn phase field model doesn't conserve mass and is mostly used in solidification microstructure formation. However, a recently modified Allen–Cahn phase field model has riveted the attention of the academic community. It was obtained by subtracting the curvature-driven flow term from the advective Allen–Cahn phase field model, and thus improves the boundedness of the phase field. More recently, the model has been further refined with the recovered signed distance function to compute interface normal vectors. This paper develops a three dimensional phase field model, based on the abovementioned Allen–Cahn phase field model. The model was discretized using a finite difference method on a half-staggered grid. More important, interfacial tension was expressed in a potential form. The model was tested against a number of cases and was applied to impacts in various conditions. Besides, the model was parallelized using the shared memory parallelism, OpenMP, to facilitate computation.

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来源期刊
International Journal for Numerical Methods in Fluids
International Journal for Numerical Methods in Fluids 物理-计算机:跨学科应用
CiteScore
3.70
自引率
5.60%
发文量
111
审稿时长
8 months
期刊介绍: The International Journal for Numerical Methods in Fluids publishes refereed papers describing significant developments in computational methods that are applicable to scientific and engineering problems in fluid mechanics, fluid dynamics, micro and bio fluidics, and fluid-structure interaction. Numerical methods for solving ancillary equations, such as transport and advection and diffusion, are also relevant. The Editors encourage contributions in the areas of multi-physics, multi-disciplinary and multi-scale problems involving fluid subsystems, verification and validation, uncertainty quantification, and model reduction. Numerical examples that illustrate the described methods or their accuracy are in general expected. Discussions of papers already in print are also considered. However, papers dealing strictly with applications of existing methods or dealing with areas of research that are not deemed to be cutting edge by the Editors will not be considered for review. The journal publishes full-length papers, which should normally be less than 25 journal pages in length. Two-part papers are discouraged unless considered necessary by the Editors.
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