ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Swirl Motions in a Cylindrical Bath Induced by Gas Injection under Reduced Pressure on Surface
Manabu IguchiYoshihumi EguchiAkira KawasakiShin-ya KitamuraKen-ichiro Naito
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1999 Volume 39 Issue 8 Pages 767-771

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Abstract

Swirl motions occurring in a bottom blowing water bath of an aspect ratio between approximately 0.2 and 1.0 were observed by eye inspection and with a high-speed video camera. The aspect ratio is defined as a ratio of the bath depth to the bath diameter. Effects of reduced pressure on the period, amplitude and some related aspects of the swirl motions were investigated. Measured values of these quantities for gas injection under the reduced pressure on the bath surface agreed with their respective measured values for gas injection with the same volumetric gas flow rate under the atmospheric pressure on the bath surface. Empirical equations for these quantities were proposed.

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