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Bubble behavior in cylindrical and square vessels under centric mechanical stirring
Journal of Iron and Steel Research International ( IF 2.5 ) Pub Date : 2021-05-13 , DOI: 10.1007/s42243-021-00609-y
Kun Wang , Yan Liu , Masamichi Sano , Ting-an Zhang

Water model experiments were carried out to investigate the bubble behavior in cylindrical and square vessels under centric mechanical stirring. The bubble behavior in the square vessel was investigated in detail by using a high-speed camera to record the transient images of the bubbles. An image analysis software was used to obtain the bubble diameter. The results showed that the centric mechanical stirring in the square vessel was suitable for breakage and dispersion of bubbles, but not suitable for that in the cylindrical vessel. Increasing the impeller blade length and impeller rotation speed was beneficial to disintegrate and disperse bubbles widely. The bubble diameter decreased with the increase in the Weber number and increased slightly with the increase in the modified Froude number. The dimensionless correlation equation of bubble diameter was obtained by the dimensional analysis method.



中文翻译:

在中心机械搅拌下圆柱和方形容器中的气泡行为

进行了水模型实验,以研究在中心机械搅拌下圆柱和方形容器中的气泡行为。通过使用高速相机记录气泡的瞬态图像,详细研究了方形容器中的气泡行为。使用图像分析软件来获得气泡直径。结果表明,方形容器中的中心机械搅拌适用于气泡的破裂和分散,但不适用于圆柱形容器中的搅拌。增加叶轮叶片长度和叶轮转速有利于广泛地分解和分散气泡。气泡直径随韦伯数的增加而减小,而随修正弗洛德数的增加而略有增加。

更新日期:2021-05-14
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