期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 162, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2020.120371
关键词
Pool boiling; Surface wettability; Homogeneous surface; Heterogeneous surface; Picosecond laser; Bubble dynamics
资金
- Ministry of Science and Technology, MOST [MOST 1082221-E-002-048]
The effect of laser-textured copper surfaces on pool boiling heat transfer in copper tubes was experimentally investigated by using deionized water as a working fluid under ambient environmental conditions. The picosecond laser system was used to apply fishbone patterns on cylindrical copper surfaces. All pool boiling experiments were performed using a saturated working fluid, and the heat flux was up to 426 kW/m(2) in these experiments. The heat transfer coefficient of laser-textured dense fishbone sample exhibited a factor up to 1.12 at the highest evaluated heat flux. Bubble dynamics were studied using images recorded using high-speed cameras under different heat flux regimes. In addition, the effect of laser-textured surfaces on the temperature distribution during pool boiling along cylindrical surfaces was analyzed. (C) 2020 Elsevier Ltd. All rights reserved.
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