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| 2D numerical simulation of underwater explosion nearfree surface based on level-set method |
| Received:March 11, 2008 |
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| DOI：10.7511/jslx20103005 |
| KeyWord:underwater explosion shock wave level-set method free surface moving boundary |
| Author | Institution |
| 师华强 |
大连理工大学 工业装备结构分析国家重点实验室 运载工程与力学学部 船舶工程学院,大连 |
| 汪玉 |
海军装备研究院 舰船所,北京 |
| 宗智 |
大连理工大学 工业装备结构分析国家重点实验室 运载工程与力学学部 船舶工程学院,大连 |
| 贾敬蓓 |
大连理工大学 工业装备结构分析国家重点实验室 运载工程与力学学部 船舶工程学院,大连 |
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| Abstract: |
| The problem of underwater explosion near free surface is a dynamic process involving multi-medium and transient nonlinearity. The dominant difficulty is how to trace the moving interface between different medium. The level-set technique is adopted herein to capture the time-dependent changes of the free surface and the moving interface of explosive gaseous product and water. To simulate compressible-fluid flow in which discontinuous shocks are present, the high-resolution method of Total Variation Diminishing (TVD) scheme is used. A numerical method has been first developed for numerical simulation of 2-D underwater explosion near free surface. The method is then extended to account for the interaction of fluid and a rigid structure present in water. The non-reflection boundary condition technique developed by Thomson is finally employed for considering the infinite flow field. |
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