Numerical study of strong shock-induced collapse of a gas bubble attached to rigid wall
We numerically investigate the collapse dynamics of a gas bubble attached to a rigid wall after being impacted by a plane shock using a level-set-based sharp interface method.In present work,we will consider a variety of shocks with strength ranging from 30 MPa to 5 GPa.Results show that the collapse dynamics of the bubble is directly associated with the initial shock Mach number,and could have different mechanisms.For example,during the collapse a rather strong wall-facing jet is observed for strong shocks,while wall-parallel jets are found for relatively weak shocks,leading to considerable differences in expectation of potential damages to the solid wall.We will show the violent change of gas bubble with time,and the complicated shock structures after the impact of the initial plane shock.At the same time,the results will also be presented in term of bubble displacements,collapse time,water hammer shock and maximum wall pressure,in order to have a better understanding of collapse process.
Sharp interface method bubble collapse shock compressible multiphase flow
J.Y Lin H. Ding X.Y Lu
Morden mechanics department ,university of science and technology of china Hefei 230027,China
国际会议
The 8th International Conference of Computational Fluid Dynamics, (ICCFD8)(第八届国际计算流体力学会议)
成都
英文
1-13
2014-07-25（万方平台首次上网日期，不代表论文的发表时间）