在完全明确的非理想流体溶解器中,一般的湿化能量边界条件是完全明确的非理想流体溶解器
Chunheng Zhao1, Alexandre Limare1, Stephane Zaleski1,2
1Sorbonne Université and CNRS, Institut Jean Le Rond d'Alembert UMR 7190, F-75005 Paris, France.
Physical review. E
|December 20, 2023
概括
我们开发了一种新的有限差异方法来模拟使用纳维埃-斯托克斯和范德瓦尔斯方程的多相流体流动. 我们的新湿能边界条件提高了接触线模拟中的稳定性和准确性.
科学领域:
- 计算流体动力学 (CFD) 是一种计算流体动力学.
- 多相流量模拟多相流量模拟
- 热力学和流体力学 热力学和流体力学
背景情况:
- 准确模拟非理想的多相流体流动对于各种工程应用至关重要.
- 现有的数值方案经常面临热力学一致性和边界条件稳定性的挑战,特别是在接触线上.
研究的目的:
- 提出一个明确的有限差异方法来模拟非理想的多相流体流.
- 引入和验证一个一般的湿化能量边界条件,以提高流体-固体界面的热力学一致性和稳定性.
主要方法:
- 用纳维尔-斯托克斯方程来计算局部密度和动量传输.
- 使用范德瓦尔斯状态方程进行压力计算.
- 在接触线上开发并实施了一种新的湿化能量边界条件.
主要成果:
- 通过静态滴滴和液体-蒸汽分离模拟验证了数值方案.
- 拟议的湿化能量边界条件减轻了在接近0和π的恒定接触角条件下观察到的不稳定性.
- 与应力平衡方法相比,实现了正确的平衡接触角度和一致的接触线动态,隐式地纳入了接口厚度.
结论:
- 显式有限差异法为模拟非理想的多相流提供了一个强大的框架.
- 新的湿化能量边界条件增强了数值稳定性和热力学一致性,通过隐式处理接口厚度,在现有方法上提供了优势.
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