一个用于在微结构表面上沸的液体薄膜的传热模型
Pengkun Li1, Qifan Zou1, Xiuliang Liu1
1School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
National science review
|April 17, 2024
概括
一个新的模型预测了用于电子制冷的沸液体薄膜中的热传递. 它使用通用缩放因子准确预测传热系数和临界热量流量,有助于微结构表面设计.
科学领域:
- 热力工程是热力工程中的一个.
- 流体动力学 流体动力学
- 阶段变换热传递热传递
背景情况:
- 液膜沸对于高功率电子产品的热管理至关重要.
- 现有的模型缺乏准确预测热传递系数 (HTC) 和临界热量流 (CHF) 的可靠性.
- 微结构表面增强热传递,但需要强大的建模.
研究的目的:
- 开发一种高保真度的热水力学模型,用于液体薄膜沸.
- 为了同时预测HTC和CHF.
- 提供适用于各种微结构表面的通用模型.
主要方法:
- 开发了一个模型,将蒸发纳入烟斗顶部的蒸发和烟斗内沸的核酸.
- 使用微层蒸发理论建模核酸沸.
- 定义了一个统一的缩放因子 (η) 用于微层面积变化与热量流.
主要成果:
- 开发的模型准确地预测了HTC和CHF.
- 发现缩放因子 (η) 是独立于管结构的.
- 该模型展示了微柱体,微粉末和微网状表面的普遍性.
结论:
- 该模型为相变热传递机制提供了基本的见解.
- 该模型是设计有效的微结构表面用于热管理的宝贵工具.
- 这项工作促进了对电子制冷中液体薄膜沸的理解和应用.
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