在确定异质核和界面热传输方面,声子-声子合和结合的作用
Xiang-Wei Lin1, Xin-Yu Ding1, Ming-Yu Shi1
1State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
ACS applied materials & interfaces
|July 16, 2025
概括
优化热传输是能源转换的关键. 这项研究表明,增强界面振动合和原子相互作用可以加速泡核形成,并提高沸热传递效率,即使在非水友表面.
科学领域:
- 表面科学和界面现象.
- 热力学和传热热力学
- 计算材料科学 计算材料科学
背景情况:
- 不同质的核和固体-液体界面热传输对于能量转换和热管理至关重要.
- 液-蒸汽相变的物理在小尺度上,特别是在微层的蒸发性质量转移期间,仍然不完全理解.
- 了解这些过程对于开发先进的热管理系统和能源转换技术至关重要.
研究的目的:
- 为了研究界面热传输对气泡核化动态的影响.
- 为了阐明接口热传输对沸点传热性能的影响.
- 确定控制界面导热的机制及其对相变现象的影响.
主要方法:
- 使用铜系统进行分子动力学模拟.
- 整合了一种机械压力控制方法来分析振动合和结合效应.
- 系统参数,包括固相原子质量和固体-液体原子间相互作用,被系统地变化,使用光谱分析来确定导热机制.
主要成果:
- 发现,在接口上增加的光谱重叠和原子间相互作用减少了核化开始时间,并提高了沸热传递效率.
- 有效的接口振动合可以减轻非水友表面的热传递退化,实现与水友表面相当的性能.
- 提出了一个"接口振动因子",通过结合振动合和结合效应,成功预测了气泡核和沸性能.
结论:
- 接口振动合和原子相互作用是核和沸热转移的关键决定因素.
- 定制界面特性为调节核化和提高沸性能提供了可行的策略,即使对于具有挑战性的表面类型.
- 拟议的界面振动因子为优化基于沸的应用程序和核化控制策略提供了一个预测工具.
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