Occurrence Condition of a Swirling Bubbling Jet in a Water Bath Covered with an Oil Layer

• Published in: ISIJ International Vol. 45; no. 11; pp. 1761 - 1763
• Main Authors: IGUCHI, Manabu, TAMAMORI, Taku, SHITARA, Moriyoshi, IGUCHI, Daisuke, SASAKI, Yasushi
• Format: Journal Article
• Language: English
• Published: Tokyo The Iron and Steel Institute of Japan 2005; Iron and Steel Institute of Japan
• Subjects: Applied sciences; Exact sciences and technology; Metals. Metallurgy; Water jet
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.45.1761

In a previous study, water model experiments were carried out to examine a possibility of treating wastewater with oil using a swirl motion of an ozone-air mixture. Air was used as a model gas for the mixture. Water and silicone oil were used as model liquids for wastewater and oil, respectively. Air was injected through a centered single-hole bottom nozzle into a cylindrical water bath covered with a silicone oil layer bubbling jet thus formed above the nozzle rotated around the vertical vessel axis under specific conditions. Two types of swirl motions appeared; shallow-water wave type and deep-water wave type. The latter swirl motion is useful for wastewater treatment because it has excellent mixing ability. Unfortunately, the occurrence condition of the swirl motion is not fully understood yet. A prediction method is proposed in this study for the occurrence condition.