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The visualization of micro bubble dynamic behavior in capillary microgrooves

✍ Scribed by Liyuan Wu; Xuegong Hu; Dawei Tang

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
397 KB
Volume
39
Category
Article
ISSN
1099-2871

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✦ Synopsis

Abstract

Rectangular capillary microgrooves are processed on transparent borosilicate glass. Using high‐speed photography, bubble dynamic behaviors in the microgrooves are observed and analyzed. It is proved that no bubble departs from the bottom of microgroove. The results show that the whole bubble lifecycle can be divided into three distinct stages according to growing velocity. Compared with macroscopic pool boiling phenomenon, bubble life cycle shortens greatly. Experimental results about time‐varying micro bubble sizes are distinctly different from those of theoretical calculation results by the dynamic micro layer model for nucleate pool boiling heat transfer. © 2010 Wiley Periodicals, Inc. Heat Trans Asian Res; 39(7): 475–481, 2010; Published online 2 June 2010 in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/htj.20309

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