Abstract
Underwater explosions are very complicated problem possessing many challenges for numerical modeling. In the present paper, a two-dimensional underwater explosion near a free surface and a structural object is numerically investigated using a 6-equation diffuseinterface model that is solved by a HLLC-type scheme with MUSCL-Hancock method based on the least-squares reconstruction and Barth and Jespersen’s limiter on quadrilateral unstructured grid. A long-time computation is performed to capture the important physics of the underwater explosion: initial underwater shock propagation and its interaction with material interfaces, expansion and contraction of the explosive gas bubble, and water jetting near a structure on the collapse of the gas bubble. These phenomena are clearly observed by the appropriate flow visualization of the computed results.
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Recommended by Associate Editor Shin Hyung Lee
Geum-Su Yeom received his B.S. and M.S. from the Department of Nuclear Engineering at KAIST, Korea, in 2000, and 2002, respectively. He obtained his Ph.D. in Aerospace Engineering from KAIST, Korea, in 2006. He is currently an Assistant Professor in the School of Mechanical & Automotive Engineering at Kunsan National University, Korea. His research interests are in the areas of computational multimaterial multiphase flows, hydrocode, and shock waves.
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Yeom, GS. Numerical study of underwater explosion near a free surface and a structural object on unstructured grid. J Mech Sci Technol 29, 4213–4222 (2015). https://doi.org/10.1007/s12206-015-0916-1
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DOI: https://doi.org/10.1007/s12206-015-0916-1