AI 中文总结
研究多相流精确润湿动力学，提出基于保守艾伦 - 卡恩晶格玻尔兹曼框架的局部几何润湿边界条件，通过虚拟相场值施加接触角，经多种测试验证，能准确模拟相关流动现象，为复杂几何中受润湿控制的流动提供准确可扩展框架。
AI 中文摘要
在这项工作中，我们为基于保守艾伦 - 卡恩的晶格玻尔兹曼框架提出了一种局部几何润湿边界条件。规定的接触角通过由局部重建的壁法线和供体流体外推构建的虚拟相场值来施加。虚拟节点润湿更新是局部的、几何一致的，并且与线程安全的大规模实现兼容，而相场质量通过单独的全局体积校正来控制。验证包括静态接触角测试、短时间液滴铺展、对疏水表面的冲击以及通过尖锐边缘孔口的重力驱动运动。模拟恢复了施加的平衡角，再现了约1/2至1/4之间与接触角相关的铺展指数，并遵循经典的We1/4最大变形标度。该模型还捕捉了捕获、释放和带破裂释放之间的转变。所提出的方法为复杂几何形状中受润湿控制的流动提供了一个准确且可扩展的框架。
英文摘要
In this work we propose a local geometric wetting boundary condition for a conservative Allen--Cahn-based lattice Boltzmann framework. The prescribed contact angle is imposed through ghost phase-field values constructed from a locally reconstructed wall normal and a donor-fluid extrapolation. The ghost-node wetting update is local, geometrically consistent, and compatible with thread-safe large-scale implementations, while phase-field mass is controlled through a separate global volume correction. Validation includes static contact-angle tests, short-time droplet spreading, impact on a hydrophobic surface, and gravity-driven motion through a sharp-edged orifice. The simulations recover the imposed equilibrium angles, reproduce contact-angle-dependent spreading exponents between approximately 1/2 and 1/4, and follow the classical W e1/4 maximum-deformation scaling. The model also captures the transition between capture, release, and release with breakup. The proposed approach provides an accurate and scalable framework for wetting-controlled flows in complex geometries.
