Transient Behaviors of Bubbles Brown from a Bottom Nozzle

• Published in: Journal of the Visualization Society of Japan Vol. 23; no. Supplement2; pp. 73 - 74
• Main Authors: YAMAMOTO, Yasuhumi, YONEHARA, Noriyoshi, UEMURA, Tomomasa
• Format: Journal Article
• Language: Japanese
• Published: The Visualization Society of Japan 2003
• Subjects: Bubble deformation; Digital streak picture; fragment of bubble; High-speed camera; Liquid microjet; Transient bubble
• ISSN: 0916-4731; 1884-037X
• DOI: 10.3154/jvs.23.Supplement2_73

Bubble behaviors in liquid have been studied in many engineering fields relating to a power plant, chemical reactor, mixing system, and so on. In those systems, Bubble shapes, motions and surface areas are the most important subjects in order to pursue transport phenomena and to estimate mixing performance. When gases are blown into liquid, bubbles are formed. Once this procedure is observed through high-speed camera, they exhibit anomalous transient shapes and behaviors are found. Similar bubble-shapes had been found in the cavitation, which occurs quite different circumstances from the present case. In this paper, a variety of bubble shapes and behaviors are shown but transient procedures how those features are continuously changing. The transient phenomena play an important role in many gas-liquid two-phase systems, since during the transient period, bubbles are exposed to rushing flow and bubbles cause turbulent flow.