标题： 格子玻尔兹曼不可混溶伪势模型中固液相互作用方案的改进 显示英文标题

标题： Improvement of Solid-Fluid Interaction Scheme in Lattice Boltzmann Immiscible Pseudopotential Models

摘要： 格子玻尔兹曼方法（LBM）框架内的伪势模型因其在物理直观性和计算可行性方面的双重优势，在计算流体力学领域成为一种重要的方法。然而，在模拟润湿现象时，现有的固-液相互作用方案在多组分不互溶流体系统中表现出持续存在的挑战，尤其体现在虚假速度伪影和不真实的质量传递边界层方面。 本研究提出了一种改进的相互作用方案，在保持实现简单性的同时，有效地减轻了这些数值伪影。此外，利用八阶离散格式增强各向同性的特性，我们开发了一种新的边界处理方法，解决了复杂界面处第二层格点数据重建的问题。 为了验证所提出的优化方案的通用性，模拟了四种基准场景，包括圆柱面上静态接触角测量、受限几何结构中的液滴动力学、不互溶置换过程以及微通道中的共流，以展示所提出的方案的能力。 结果显示，改进后的方案能够很好地模拟各种复杂的不互溶多相流动。 显示英文摘要

摘要： The pseudopotential model within the Lattice Boltzmann Method (LBM) framework has emerged as a prominent approach in computational fluid dynamics due to its dual strengths in physical intuitiveness and computational tractability. However, when modeling wettability phenomenon, existing solid-fluid interaction schemes exhibit persistent challenges in multi-component immiscible fluid systems, notably manifested through spurious velocity artifacts and unphysical mass-transfer boundary layers. This study presents an improved interaction scheme that preserves implementation simplicity while effectively mitigating these numerical artifacts. Furthermore, leveraging the enhanced isotropy characteristics of eighth-order discrete schemes, we develop a novel boundary treatment methodology addressing second-layer lattice data reconstruction at complex interfaces. To verify the universality of the proposed optimization scheme, four benchmark scenarios, including static contact angle measurement on cylindrical surface, droplet dynamics through confined geometries, immiscible displacement processes, and co-current flow in microchannels, are simulated to demonstrate the proposed scheme's capability. The results show that the improved scheme can well simulate various complex immiscible multiphase flows.