在相场格子中的简化湿边界方案,博尔兹曼模型用于曲边界上的湿现象
Shengyuan Zhang1, Jun Tang1, Huiying Wu1
1School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
Physical review. E
|September 19, 2023
概括
为相场格子博尔兹曼模型开发了一个简化的湿边界方案. 这种新方法准确地模拟了曲面上的湿现象,没有大规模泄漏,提供了更好的实施方便.
科学领域:
- 计算流体动力学的流体动力学.
- 多相流量建模多相流量建模
- 接口现象 接口现象
背景情况:
- 阶段场格子博尔兹曼模型对于模拟复杂的流体动力学至关重要.
- 准确模拟曲面上的湿现象仍然是一个挑战.
- 现有的方法往往涉及复杂的实施和潜在的问题,如大规模泄漏.
研究的目的:
- 为相场格子博尔兹曼模型开发一个简单而准确的湿边界方案.
- 允许在曲线边界上直接规定接触角.
- 为了避免非物理的虚假质层和质量泄漏.
主要方法:
- 一个新的简化湿边界方案,结合了流体-固体相互作用和几何方法.
- 在流体边界节点上使用几何公式直接确定顺序参数梯度.
- 使用两种数值方法:同otropic中心方案和局部梯度方案.
- 在高密度比下通过数值模拟进行验证.
主要成果:
- 拟议的方案很容易实现,没有复杂的插值或特征向量计算.
- 实现了直接接触角度的处方,消除了对幽灵节点的需求.
- 数字模拟证实没有质量泄漏和假质量层.
- 该模型表现出良好的能力和令人满意的准确性,用于在曲的边界上湿.
结论:
- 开发的简化湿边界方案为模拟湿现象提供了强大而高效的解决方案.
- 直接的几何方法简化了实施,提高了准确性.
- 这种方法适用于模拟复杂的界面行为在曲表面的多相流.
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