对于颜色梯度格子的反应有限蒸发,博尔兹曼模型的波兹曼模型
Gaurav Nath1, Othmane Aouane1, Jens Harting1,2
1Helmholtz Institute Erlangen-Nürnberg for Renewable Energy, Forschungzentrum Jülich, Cauerstr. 1, 91058 Erlangen, Germany.
The Journal of chemical physics
|March 18, 2025
概括
我们为格子博尔兹曼 (LB) 模拟开发了一种新的反应有限蒸发模型. 这种方法准确地模拟了流体接口的质量去除,增强了LB模型的应用.
科学领域:
- 计算流体动力学 计算流体动力学
- 多相流量建模多相流量建模
- 阶段过渡现象 阶段过渡现象
背景情况:
- 格子博尔茨曼 (LB) 模型缺乏模拟蒸发的内在机制.
- 现有的扩散驱动蒸发模型可能是计算密集型和数值不稳定的.
- 精确模拟蒸发对于各种工业和自然过程至关重要.
研究的目的:
- 为颜色梯度LB框架引入一种新的反应有限蒸发模型.
- 为了能够对涉及内在蒸发机制的过程进行LB模拟.
- 提高LB方法对复杂相位过渡现象的适用性.
主要方法:
- 开发了一种反应有限的蒸发模型,直接强制在流体界面进行质量去除.
- 在LB框架内利用颜色梯度大小来有效地识别蒸发地点.
- 集成模型,对核心LB算法进行最小的更改,确保数值稳定性.
主要成果:
- 在模拟中实现了高精度,单位密度比率的误差低于5%.
- 在各种接口几何形状和蒸发流量大小中表现出强度.
- 验证了模型对不同密度对比的性能,特别是在较小的流量大小下.
结论:
- 拟议的反应有限蒸发模型显著扩展了颜色梯度LB框架的功能.
- 该方法为模拟蒸发提供了一个计算效率高和数值稳定的方法.
- 这一进步适用于现实世界的场景,如滴水蒸发和干燥过程.
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