The Dynamic Behavior of Contracted and Jetting Process for an

• Main Authors: Lin, Chih Rong, 林志榮
• Other Authors: Too,Gee-Pinn James
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/99987400065747552140

碩士 === 國立成功大學 === 造船工程學系 === 85 === The dynamic behavior of an explosive bubble is a complicated phenomenon. The basic equations to simulate the behaviors are: Laplace equation, Bernoulli equation and adiabatic state equation. Three dimensional Boundary Element (BEM) is used to solve boundary integral equation. The numerical algorithm is found to be successful in simulating the collapse and jetting of a single bubble in infinite domain. We discuss the numerical convergence problem and compare with the 1-D Rayleigh-Plesset equation in this paper. The research results are: contracted and expanded diagrams of 1-D Rayleigh bubble; deformed history diagrams of an underwater explosion bubble in the contracted process; and the factors that result in bubble jetting are gravity; pressure around the bubble and initial gas pressure of an internal bubble. Bubble jetting can shorten the active time of bubble collapse.