THERMAL SCIENCE

International Scientific Journal

Yutang Zhao

,

Xiaohui Zhang

,

Xinting Tong

,

Xiaolv Yu

,

Jing Luo

,

Yanxiong Fu

,

Hua Wang

THE MOTION AND WAKE CHARACTERISTICS OF BOTTOM BLOWING COAXIAL DOUBLE BUBBLES

ABSTRACT
In the process of bottom blowing bath smelting, continuous bubbles are formed and rise in the melt after the bottom blowing gas is ejected. In order to reveal the motion behavior and wake characteristics of continuous bubbles formed during the injection process, the rising process of coaxial double bubbles is studied through numerical simulation, the velocity and deformation characteristics of coaxial double bubbles in the rising process are obtained. Based on the vortex identification reconstruction of the flow field, the characteristics of formation, evolution, and configuration of bubble wake are obtained. The results show that in terms of motion characteristics, the aspect ratio of the upper bubble is always less than 1, and lower bubble has a large span of change: the minimum is 0.85 and the maximum is 1.2. As the two bubbles approach, the aspect ratio of the upper bubble is always less than 1, while the maximum aspect ratio of the lower bubble can reach 1.2. In terms of wake characteristics, the vorticity on the upper bubble surface is larger. When the wake rotation centers of the upper and lower bubbles merge with each other, the instantaneous acceleration of the lower bubble reaches the maximum.
KEYWORDS
Bath smelting, Bubble motion behavior, Wake, numerical simulation, Vortex identification
PAPER SUBMITTED: 2023-12-08
PAPER REVISED: 2024-01-08
PAPER ACCEPTED: 2024-01-11
PUBLISHED ONLINE: 2024-04-14
DOI REFERENCE: https://doi.org/10.2298/TSCI231208092Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 5, PAGES [3751 - 3763]
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The motion and wake characteristics of bottom blowing coaxial double bubbles

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence