Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Interaction between Gas Jets from Two Orifices in Liquid
Yasuhisa OZAWAYoshiyuki MATSUIKazumi MORIMasamichi SANO
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1987 Volume 73 Issue 11 Pages 1543-1550

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Abstract

A study has been made of the interaction between gas jets from two orifices in liquid by using a high speed cinecamera. Nitrogen was injected into a mercury bath through two orifices of 0.1 cm in diameter (do) located at the transparent vessel bottom. The distance between the two orifices (L) was varied from 0.2 to 2.0 cm. Additionally, experiments were done of helium injection into the water bath through two orifices (do= 0.2 cm, L=-0.64.0 cm).
The bubbling behavior at two orifices has been classified into three patterns. "Coalescing" : two adjacent bubbles growing at the orifice exits coalesce into one. "Contacting" : the adjacent bubbles contact without coalescing. "No contacting" : the adjacent bubbles do not contact. "Coalescing" occurred more frequently with decreasing L, while "no contacting" time fraction increased with increasing L. The time fraction for "contacting" increased to a maximum and then decreased, as L increased. The jetting behavior at two orifices was found to be strongly influenced by L. In certain ranges of L, jetting at two orifices occurred more frequently than in the case of a single orifice. A theoretical model is given to explain the interaction between gas jets from two orifices in liquid.

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© The Iron and Steel Institute of Japan
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