Velocity of rise of air bubbles in sea-water, and their types of motion

✍ Scribed by G. Houghton; P.D. Ritchie; J.A. Thomson

• Publisher: Elsevier Science
• Year: 1957
• Tongue: English
• Weight: 186 KB
• Volume: 7
• Category: Article
• ISSN: 0009-2509
• DOI: 10.1016/0009-2509(57)80026-8

✦ Synopsis

POPE [l] and Sorrrnwaa~

[2], commenting upon the foamiug properties of sea-water, suggested the possible presence of surface-active substances to account for these properties, though they were unable to detect such materials. Sruxx [8] has shown that long-chain fatty acids (e.g. caproic and capric). in low concentrations of the order 1.5 x 10-r molar, can reduce the velocity of rise of oxygen bubbles in water. A similar effect on the velocity of rise of air bubbles in sea-water has now been observed; again, the presence of surface-active agents in sea-water may be inferred.

The method used was to time the rise, in a column of water 160 cm long, dlam. 6 cm, of bubbles produced singly at a jet. The velocity of rise was measured with an accuracy betterthanf6percent.

.A micrometer syringe was designed to produce single bubbles whose volumes could be measured with an accuracy better than f 0.5 per cent.