computational treatments of cavitation effects in near-free-surface underwater shock analysis
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ID: 145102
2001
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Abstract
Fluid cavitation constitutes an expensive computational nuisance in underwater-shock response calculations for structures at or just below the free surface. In order to avoid the use of a large array of cavitating acoustic finite elements (CAFE), various wet-surface approximations have been proposed. This paper examines the performance of two such approximations by comparing results produced by them for 1-D canonical problems with corresponding results produced by more rigorous CAFE computations. It is found that the fundamental limitation of wet-surface approximations is their inability to capture fluid-accretion effects. As an alternative, truncated CAFE fluid meshes with plane-wave radiation boundaries are shown to give good results. In fact, a single layer of CAFE is found to be comparable in accuracy to the better of the wet-surface approximations. The paper concludes with an examination of variations in CAFE modeling.
| Reference Key |
sprague2001shockcomputational
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|---|---|
| Authors | ;Michael A. Sprague;Thomas L. Geers |
| Journal | Nano letters |
| Year | 2001 |
| DOI |
10.1155/2001/853074
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