Confined Bubble and Heat Transfer during Flow Boiling In a High Aspect Ratio Mini-Channel

被引：4
作者：
Wang, Yuan [1 ]
Sefiane, Khellil [1 ]
机构：
[1] Univ Edinburgh, Sch Engn, Edinburgh EH9 3JL, Midlothian, Scotland
来源：
DIFFUSION IN SOLIDS AND LIQUIDS VI, PTS 1 AND 2 | 2011年 / 312-315卷
关键词：
Bubble dynamics; Heat transfer; Flow boiling; Confinement;
D O I：
10.4028/www.scientific.net/DDF.312-315.548
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Single vapour bubble growth and heat transfer mechanism during flow boiling in a rectangular horizontal mini-channel were experimentally investigated. The hydraulic diameter of the channel was 1454 pm, with an aspect ratio (W-in/d(in)) of 10. Degassed FC-72 was used as the working liquid. In this paper, bubble equivalent radius was found to increase linearly till a critical time, beyond which the growth turned into exponential. Bubble growth rate increases with increasing heat flux. Heat transfer mechanisms of the bubble growth at different heat fluxes and mass fluxes were discussed. in addition, the relation between thermal and flow conditions with bubble temporal geometry was explored.
引用
收藏
页码：548 / 553
页数：6
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