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多气泡耦合作用下非球状特性数值研究

DOI: 10.3969/j.issn.1006-7043.201406023

Keywords: 非球形气泡动力学, 边界元方法, 势流理论, 多气泡, 等间距, 不等间距, 射流速度

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Abstract:

为了研究多个气泡相互耦合作用时其表现出的运动特性,采用基于势流理论的边界元方法对多气泡间耦合作用进行数值模拟。将数值解与Rayleigh-Plesset方程解析解对比,使得数值模型的有效性和收敛性得以验证;然后,建立3个气泡的数值模型,研究无量纲参数气泡间距d对气泡运动和形态的影响。等间距布置3个气泡,当d=1.8时,中间的气泡在抑制作用下呈现“圆柱状”,随着气泡间距的增大,其最终趋于“球形”,且气泡上、下2个气泡射流速度增大;不等间距布置3个气泡,距离远的气泡最先发生射流,射流完成时该气泡已开始回弹。

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