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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.5

ISSN 印刷: 1065-3090
ISSN オンライン: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v9.i2-3.100
10 pages

VISUALIZATION OF THE MICROBUBBLE GENERATED IN THE DROPLET IMPINGING ON THE HEATED QUARTZ SURFACE

Shigeaki Inada
Department of Mechanical System Engineering, Gunma University, 1-5-1 Tenjincho, Kiryu, 376-8515, Japan
Youhei Kawahara
Department of Mechanical System Engineering, Gunma University, 1-5-1 Tenjincho, Kiryu 376-8515, Japan

要約

The generation behavior of the minute vapor bubble which arose in the liquid—solid contact surface (wetting surface) at the initial stage of the collision was photographed from the backside of the quartz heating surface. In the heating surface temperature range from 180°C to 520°C, the effect of the heating surface temperature and the elapsed time after the collision on the number of the bubble generation was examined. With the increase in the heating surface temperature, the number of the bubble generation increases. Many bubbles were observed at the initial stage of droplet collision. The size of the dry spot, that is, attached area of the bubble increases with the increase in the heating surface temperature.


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