伪电位格子博尔兹曼模型具有可调节的共存密度,没有界面速度滑动
Junren Hou1, Shunli Jiang1,2, Yugao Ma3
1Tsinghua University, Department of Engineering Physics, Beijing 100084, China.
这项研究介绍了一种新的伪潜在模型,用于两相流的格子博尔兹曼法模拟. 新型号实现了热力学一致性,并防止了界面速度滑动,提高了短暂和移动条件下的准确性.
科学领域:
- 计算流体动力学的流体动力学.
- 热力学是一种热力学.
- 流体力学 流体力学 流体力学
背景情况:
- 晶格博尔兹曼法 (LBM) 中的伪潜力模型对于模拟两相流量至关重要.
- 热力学一致性是现有的伪潜在模型的一个关键挑战.
- 当前的模型经常表现出界面速度滑动或缺乏热力学一致性,特别是在动态条件下.
研究的目的:
- 为LBM开发一种新的伪潜在模型,以实现热力学一致性.
- 为了消除伪潜在模型中的界面速度滑动.
- 为了验证模型在短暂和移动流量条件下的性能.
主要方法:
- 在标准模型中引入了一个修改后的伪潜在力项 (2γ2ψψ).
- 查普曼-恩斯科格分析用于调查错误术语.
- 进行了对双相库埃特和波泽伊流的模拟.
- 与流体体积 (VOF) 方法进行过渡模拟的比较.
主要成果:
- 拟议的模型实现了热力学一致性,并防止了界面速度滑动.
- 数字模拟证明了二次准确性.
- 该模型准确地捕捉了短暂的现象,并与VOF方法结果进行了验证.
- 我们成功地实现了滴水喷和液体薄膜蒸发的模拟.
结论:
- 新型伪电位模型为LBM中的热力学一致的两相流体模拟提供了一个强大的解决方案.
- 该模型克服了现有方案的局限性,特别是在界面速度滑动方面.
- 它显示了复杂的界面现象和质量转移模拟的巨大潜力.
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