| 纳米颗粒悬浮在加热铂丝上的过冷沸腾 |
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| 引用本文： | 李春辉,王补宣,彭晓峰.纳米颗粒悬浮在加热铂丝上的过冷沸腾[J].工程热物理学报,2005,26(4):635-637. |
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| 作者姓名： | 李春辉 王补宣 彭晓峰 |
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| 作者单位： | 清华大学相变与界面传递现象实验室,北京,100084;清华大学相变与界面传递现象实验室,北京,100084;清华大学相变与界面传递现象实验室,北京,100084 |
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| 摘 要： | 本文对加热铂丝上25 nm SiO2颗粒与水悬浮液的过冷沸腾进行实验观察,纯水和纳米颗粒悬浮液的沸腾过程基本相同,但低热流密度下纳米颗粒悬浮液中的气泡重叠(或气泡团聚体)现象非常普遍。在实验观察基础上分析了气泡重叠(或气泡团聚体)成因,纳米颗粒在气泡表面的吸附和浓聚增大了气泡间吸引力和气泡质量,最终导致气泡重叠(或气泡团聚体)的形成。
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| 关 键 词： | 纳米颗粒悬浮液 过冷沸腾 气泡重叠(或气泡团聚体) |
| 文章编号： | 0253-231X(2005)04-0635-03 |
| 修稿时间： | 2005年3月3日 |
SUBCOOLED BOILING OF NANO-PARTICLE SUSPENSIONS ON A PT WIRE |
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| LI Chun-hui,WANG Bu-xuan,PENG Xiao-feng.SUBCOOLED BOILING OF NANO-PARTICLE SUSPENSIONS ON A PT WIRE[J].Journal of Engineering Thermophysics,2005,26(4):635-637. |
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| Authors: | LI Chun-hui WANG Bu-xuan PENG Xiao-feng |
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| Abstract: | Experiments were conducted to observe subcooled boiling of nano-particle suspensions consisting of 25 nm SiO2 particles and water. The boiling of nano-particle suspension was similar to that of pure liquid, while the bubble overlap (or bubble cluster) was observed as common phenomena for the boiling of nano-particle suspensions at low heat flux. Analyses were conducted to understand the form of bubble overlap (or bubble clusters). Due to the attachment of nano-particles on the bubble surface, an extra attracting force was induced among bubbles, and the mass of bubble was increased, causing the form of bubble overlap (or bubble clusters). |
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| Keywords: | nano-paxticle suspension subcooled boiling bubble over lap (or bubble cluster) |
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