基于体积力控制的气泡绕流数值模拟研究

Numerical simulation of Flow Around a Bubble Based on Control of Volume Force

为了研究输运过程中的气泡绕流,提出了一种简单易行的体积力控制方法。该方法建立了控制力与气泡位移之间的关联关系,从而可以快速将气泡位置固定住。采用体积力控制方法,对不同了流动参数下的气泡绕流进行了数值模拟研究。结果表明,大We数下气泡变形均较为显著,气泡形状与Re数关系密切。该文模拟得到的气泡形状和阻力系数与文献中结果吻合一致,表明该方法能正确模拟变形气泡的受力问题。

In present study,a control method of volume force is proposed to investigate the flow around a bubble.In order to control the position of bubble,the relationship between the force and the transient displacement of bubble is constructed in this paper.The flows around a bubble in different conditions are simulated by using our method of volume force.The results show that the bubble shape has a close relationship with the Re number when the We number is large.The obtained results,including the bubble shape and the drag force coefficient,are well compared to the results in literatures,which prove that our method is applicable to the computation of drag force of deformable bubble.