Experimental and numerical study on the growth and collapse of a bubble in a narrow tube  

作　　者：Bao-Yu Ni A-Man Zhang Qian-Xi Wang Bin Wang 

机构地区：[1]College of Shipbuilding Engineering,Harbin Engineering University [2]School of Mathematics,University of Birmingham [3]National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics

出　　处：《Acta Mechanica Sinica》2012年第5期1248-1260,共13页力学学报（英文版）

基　　金：supported by the Lloyd’s Register Educational Trust(The LRET);the National Natural Foundation of China(10976008)

摘　　要：The growth, expansion and collapse of a bubble in a narrow tube are studied using both experiments and numerical simulations. In experiment, the bubble is generated by an electric spark in a water tank and recorded by a highspeed camera system. In numerical simulation, the evolution of the bubble is solved by adopting axisymmetric boundary integral equation, considering the surface tension effect. The results of experiments and numerical simulations are compared and good agreements are achieved. Both of them show that a counter-jet forms and penetrates the bubble at the end of the collapse stage, before a ring type bubble forms. Under the attraction of the tube wall due to Bjerknes force, a ring jet is generated, pointing towards the tube. On the basis of this, some physical quantities like the pressure on the tube wall and kinetic energy are calculated in a case study. The effects of tube diameters and tube lengths on the bubble＇s behaviors are also investigated.The growth, expansion and collapse of a bubble in a narrow tube are studied using both experiments and numerical simulations. In experiment, the bubble is generated by an electric spark in a water tank and recorded by a highspeed camera system. In numerical simulation, the evolution of the bubble is solved by adopting axisymmetric boundary integral equation, considering the surface tension effect. The results of experiments and numerical simulations are compared and good agreements are achieved. Both of them show that a counter-jet forms and penetrates the bubble at the end of the collapse stage, before a ring type bubble forms. Under the attraction of the tube wall due to Bjerknes force, a ring jet is generated, pointing towards the tube. On the basis of this, some physical quantities like the pressure on the tube wall and kinetic energy are calculated in a case study. The effects of tube diameters and tube lengths on the bubble＇s behaviors are also investigated.

关 键 词：Narrow tube Ring bubble Counter-jet Ringjet Bubble experiment 

分 类 号：O35[理学—流体力学]