[Oral Presentation]A phase-field lattice Boltzmann model with tensorial mobility to suppress spontaneous shrinkage of droplets

A phase-field lattice Boltzmann model with tensorial mobility to suppress spontaneous shrinkage of droplets
ID:68 Submission ID:143 View Protection:ATTENDEE Updated Time:2025-09-30 10:59:57 Hits:74 Oral Presentation

Start Time:2025-10-12 11:15 (Asia/Shanghai)

Duration:15min

Session:[S3] Computational heat transfer and fluid dynamics » [S4-2] Session 4-2: Computational multi-component and multiphase flows

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Abstract
使用Cahn-Hilliard方程模拟两相流时,液滴/气泡的自发收缩是一个已知问题。为了解决这一限制,通过引入一种新的各向异性张量迁移率,提出了一种改进的 Cahn-Hilliard 模型。这种迁移张量允许独立调整其法向和切向分量,从而有效抑制曲率驱动效应。然后开发晶格玻尔兹曼方案来求解张量卡恩-希利亚德方程。该方案将张量扩散项分为具有恒定迁移率的扩散项和源项,从而促进了高效的数值实现。为了评估所提模型的数值性能,比较了原始Cahn-Hilliard方程和张量方程之间单个气泡的平衡状态。结果表明,减小切向迁移分量有效抑制了气泡自发收缩,提高了阶参数的边界性。总体而言,所提出的模型突出了其在保持计算效率的同时保持色散相体积和实现物理保真度方面的有效性。
 
Keywords
Cahn-Hilliard equation,lattice Boltzmann method,tensorial mobility
Speaker
Qipo Dong
Harbin Institute of Technology, China

Submission Author
Qipo Dong Harbin Institute of Technology
Xingchun Xu Harbin Institute of Technology
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