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Numerical Simulation of Shock-induced Bubble Collapse


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Numerical Simulation of Shock-induced Bubble Collapse
DENG Shu-shengTAN Jun-jie
School of Energy and Power Engineering,NUST,Nanjing 210094,China
shock bubble collapse compressible multi-medium flow modified ghost fluid method arbitrary Lagrangian-Eulerian method
To simulate the dramatic changes of the material interface in compressible multi-medium flow, the mesh distortion and topology changes induced by the motion of the material interface are dealt with by using developed unstructured moving grids generation approach with large-scale deformation and topological changes. Lagrange interface is constructed by Riemann solver for tracking the multi-medium interface explicitly. Modified ghost fluid method is adopted to construct the boundary conditions of the material interface,and conservative arbitrary Lagrangian-Eulerian formulas are solved in each medial relatively. The collapse of the cylindrical helium bubble in air and the 2D air cavity in water induced by shock is simulated. The results indicate that the interface tracking method for multi-medium flow based on unstructured moving grids developed here is effective to handle the topological changes induced by the interface.


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Last Update: 2012-10-25