克服热传递悖论:纳米引发"枪泡"并逆转沸曲线
Jinliang Xu1, Wenli Ye1, Xiongjiang Yu1
1The Beijing Key Laboratory of Multiphase Flow and Heat Transfer for Low Grade Energy Utilization, North China Electric Power University, Beijing 102206, People's Republic of China.
Nano letters
|October 20, 2023
概括
在沸表面上引入纳米,通过激活非蒸发区域,显著增强热传递. 这一突破实现了超高的泡频率,并揭示了反转沸曲线的新机制.
科学领域:
- 热传递是一种热传递.
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 提高沸热传递对于热管理至关重要.
- 之前的方法在薄液体薄膜中的热传递限制方面遇到了困难.
- 在非蒸发区域激活"惰性"液体分子仍然是一个挑战.
研究的目的:
- 为了增加沸时的传热极限.
- 为了研究纳米山脊对沸现象的影响.
- 了解超高气泡频率和反向沸曲线背后的机制.
主要方法:
- 在沸的表面上引入纳米脊.
- 试验量化沸时的热传递.
- 对泡频率和沸曲线行为进行分析.
主要成果:
- 不蒸发区域的破坏导致了剧烈的沸.
- 实现了前所未有的泡频率1186赫兹.
- 观察到一个反向的沸曲线现象.
结论:
- 纳米山脊有效地通过激活非蒸发区域来增强沸热传递.
- 该研究发现了超高气泡产生机制.
- 揭示了反向沸曲线的新奇机制.
相关概念视频
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