Influences of different forces on the bubble entrainment into a stationary Gaussian vortex

查看全文 作　　者：ZHANG [1]AMan;NI [1]BaoYu

机构地区：[1]College of Shipbuilding Engineering,Harbin Engineering University

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2013年第56卷第11期,共8页

基　　金：supported by the Excellent Young Scientists Fund(Grant No.51222904);the national natural science foundation of China(Grant No.11302056) 摘　　要：Simulations of bubble entrainment into a stationary Gaussian vortex are performed by using the combined particle tracking method(PTM)and boundary element method(BEM).Before the bubble is captured by the vortex core,oscillation and migration of the quasi-spherical nucleus are solved by using improved RP equation and the momentum theorem in the Lagrangian reference frame simultaneously,and the trajectory of the nucleus presents a kind of reduced helix shape.After captured by the vortex core,the bubble grows immediately and moves and deforms along the vortex core axis.The non-spherical evolution and deformation of the bubble is simulated by adopting a mixed Eulerian-Lagrangian method.The output of quasi-spherical stage is taken as the input of non-spherical stage,and all the behaviors of the entrained bubble can be simulated such as inception,motion,deformation and split.Numerical results agree well with published experimental data.On this basis,the influences of various factors such as viscosity,surface tension,buoyancy are studied systemically.Hopefully the results from this paper would provide some insight into the control on vortex bubble entrainment. 关键词：夹带涡旋高斯拉格朗日方法泡沫势力轴变形边界元法

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Influences of different forces on the bubble entrainment into a stationary Gaussian vortex

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