外部Stefan和内部Marangoni热流体动力学用于蒸发毛细血管桥梁
Arnov Paul1, Apurba Roy1, Purbarun Dhar1
1Hydrodynamics and Thermal Multiphysics Lab (HTML), Department of Mechanical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Langmuir : the ACS journal of surfaces and colloids
|February 27, 2024
概括
封闭液体桥梁的蒸发主要由封闭控制,而不是可湿性. 更高的限制通过增加蒸汽度来减少蒸发,而湿会影响内部水力动力学和外部向导.
科学领域:
- 流体动力学 流体动力学
- 热量和质量转移是热量和质量转移.
- 表面科学是一门学科.
背景情况:
- 毛细管桥在各种应用中至关重要,但在封闭状态下,它们的蒸发动态尚未完全理解.
- 蒸发过程中的内部马兰戈尼水力动力学和外部斯蒂芬向导是复杂的现象,需要详细的研究.
研究的目的:
- 调查湿度适度,封闭的毛细血管桥梁和凸起中的蒸发机制.
- 探索内部的马兰戈尼水力动力学和外部的斯蒂芬向导动力学.
- 分析受限,湿状态和接触线动态对蒸发的影响.
主要方法:
- 使用水平集 (LS) 方法和任意拉格朗日-欧勒尔 (ALE) 框架进行过渡模拟.
- 具有适当边界条件的液体和气体领域的完全合模拟.
- 一般接触线动态 (CCR和CCA模式) 的建模.
主要成果:
- 蒸发速度主要取决于封闭的程度,更高的封闭减少了蒸发.
- 湿度在整体蒸发速率中起到边际作用,但显著影响了内部马兰戈尼和外部斯蒂芬向动力学.
- 与水友性限制相比,超疏水性限制导致蒸汽度增加和热马兰戈尼流量增强.
结论:
- 封闭是控制毛细血管桥梁蒸发速度的主导因素.
- 潮湿状态影响内部流量和外部蒸汽传输,影响热流体过程.
- 结果为设计高效的热流体系统提供了洞察力,其中包括用于热传输和材料沉积的液体桥梁.
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