Article: Water entry of a body which moves in more than six degrees of freedom.
Proceedings. Mathematical, physical, and engineering sciences
2016 Volume 471, Issue 2177, Page(s) 20150058
Abstract: The water entry of a three-dimensional smooth body into initially calm water is examined. The body can move freely in its 6 d.f. and may also change its shape over time. During the early stage of penetration, the shape of the body is approximated by a ... ...
| Abstract | The water entry of a three-dimensional smooth body into initially calm water is examined. The body can move freely in its 6 d.f. and may also change its shape over time. During the early stage of penetration, the shape of the body is approximated by a surface of double curvature and the radii of curvature may vary over time. Hydrodynamic loads are calculated by the Wagner theory. It is shown that the water entry problem with arbitrary kinematics of the body motion, can be reduced to the vertical entry problem with a modified vertical displacement of the body and an elliptic region of contact between the liquid and the body surface. Low pressure occurrence is determined; this occurrence can precede the appearance of cavitation effects. Hydrodynamic forces are analysed for a rigid ellipsoid entering the water with 3 d.f. Experimental results with an oblique impact of elliptic paraboloid confirm the theoretical findings. The theoretical developments are detailed in this paper, while an application of the model is described in electronic supplementary materials. |
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| Language | English | |||||
| Publishing date | 2016-07-28 | |||||
| Publishing country | England | |||||
| Document type | Journal Article | |||||
| ZDB-ID | 209241-4 | |||||
| ISSN | 1471-2946 ; 1364-5021 ; 0962-8444 ; 0080-4630 ; 0950-1207 | |||||
| ISSN (online) | 1471-2946 | |||||
| ISSN | 1364-5021 ; 0962-8444 ; 0080-4630 ; 0950-1207 | |||||
| DOI | 10.1098/rspa.2015.0058 | |||||
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| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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