白丽娜,曹佰旭,胡钊晨,李少白

• 1:沈阳航空航天大学能源与环境学院

摘要(Abstract)：

为了揭示黏弹性流体中单气泡的运动规律,采用高速摄像技术对聚丙烯酰胺(PAA)溶液中单气泡的运动行为进行了研究。通过Matlab 10.0利用自编程序得到了气泡的上升速度,考察了溶液流变性质和表面活性剂对气泡上升速度的影响。结果表明:气泡的上升速度随体积的增大而增大,并发生速度跃迁现象,发生跃迁时的临界体积随溶液黏弹性的增大而减小,随表面活性剂浓度的增大而增大。气泡形状的变化与速度跃迁相关,当气泡体积低于临界体积时,气泡的形状为球形或椭球型,当气泡体积高于临界体积时,气泡出现了尖端尾部,且尖端尾部两侧界面向气泡内部凹进。提出了预测气泡速度跃迁的临界条件,预测值与实验值重现性较好。

关键词(KeyWords)： 单气泡;速度跃迁;黏弹性流体;气泡形状;经验关联式

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21406141);; 辽宁省教育厅科研项目(L201733)

作者(Author): 白丽娜,曹佰旭,胡钊晨,李少白

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