用Level Set方法对水下两个气泡运动的数值模拟  

Numerical Simulation on Motion of Two Underwater Bubbles Using Level Set Method

作　　者：赵知辛[1] 王焕然[1] 李彦鹏[2] 席光[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]长安大学环境科学与工程学院,西安710064

出　　处：《西安交通大学学报》2009年第7期11-15,共5页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(50676073)

摘　　要：利用Level Set方法,三维数值模拟了两个气泡的上升运动.通过改变气泡尺寸及位置,研究气泡对在上升过程中的尾迹流及其相互作用规律.数值模拟准确再现了气泡对的变形、吸引或排斥行为,气泡上升速度计算结果与经验关联式结果吻合;气泡周围的速度场揭示了两个气泡尾迹流的流体动力学作用;对于水平或垂直放置的气泡对,当下方气泡有大于50%的投影面积进入到上方气泡的尾流区时,两个气泡将发生聚并现象.The three-dimensional motion of underwater two bubbles is directly simulated using the Level Set method. The interaction of the bubbles and their wakes are studied by changing their position and size. The behaviors such as distortion, attraction, and repulsion of the two bubbles are obtained and the calculated values of the bubbles velocity agree well with the empirical correlations. The interaction in fluid dynamics between the wakes of the two bubbles is described by the velocity field around the bubbles. For the two bubbles placed horizontally or vertically, the bubbles will converge when more than 50% of the projection area of the lower bubble enters the wake of the upper bubble.

关 键 词：相互作用的气泡 尾迹流 LEVEL SET方法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]