Numerical simulation of bubbly flow around two tandem square-section cylinders by vortex method
Numerical simulation of bubbly flow around two tandem square-section cylinders by vortex method
复制标题
DOI：
10.1243/09544062jmes697
复制
发表时间：
2008-02
期刊：
影响因子：
--
通讯作者：
T. Degawa;T. Uchiyama
中科院分区：
文献类型：
--
作者：
T. Degawa;T. Uchiyama
采用作者在前人的研究中提出的涡流法，模拟了两串列方截面圆柱体周围空气-水的气泡流动。Shakouchi等人对其流动进行了实验研究。气缸s的边长为30mm，气缸之间的距离为2s。水雷诺数为10000，空气体积流量比为0.03。一对卡门涡出现在第一个圆柱的后面。第二柱体下游的卡门涡强度大于单柱体。卡门涡的强度由于气泡夹带而减弱。与单缸相比，第一缸后表面的压力减小是放松的。因此，本文的模拟可以预测作用在第一缸上的阻力的减小，并通过相应的实验研究得到了澄清。
The air—water bubbly flow around two tandem square-section cylinders is simulated with the vortex method proposed by the authors in a prior study. The flow was experimentally investigated by Shakouchi et al. The side length of cylinder s is 30 mm, and the distance between the cylinders is 2s. The water Reynolds number is 10 000, and the air volumetric flow ratio to whole fluid is 0.03. A pair of Karman vortices appear behind the first cylinder. The strength of the Karman vortex downstream of the second cylinder is larger than that for the single-cylinder. The strength of the Karman vortex reduces due to the bubble entrainment. The pressure reduction on the rear surface of the first cylinder is relaxed when compared with that on the single-cylinder. Therefore, the present simulation can predict the reduction of the drag force acting on the first cylinder, which was clarified by the corresponding experimental study.