Author(s)

N. Kugou, K. Ishida & A. Yoshida

Abstract

Experimental study on motion of air bubbles in seawater (terminal velocity and drug coefficient of air bubble rising in seawater) N. ~ u ~ o u ' , K. 1shid2 & A. yoshida3 '~hiyoda Advanced Solutions Corporation, Japan 2 Kobe University of Mercantile Marine, Japan 3 ~ o b e University of Mercantile Marine Graduate School Japan Abstract From an environmental conservation viewpoint, it is often required to eliminate air bubbles contained in the cooling seawater discharged from industrial plants to the sea. There is a de-aeration chamber as a technology to eliminate these bubbles from the discharged seawater. A terminal velocity, u, and a drug coefficient, Cd of air bubbles rising in seawater are essential engineering information for the design of de-aeration chamber. However, there is no quantitative investigation for u, and Cd of air bubbles rising in seawater though many studies have been carried out for those in water. Therefore, u, of a single air bubble rising freely in stagnant seawater of

Keywords