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.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
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)