Sun, S;
Wu, GX;
Xu, G;
(2019)
Free fall water entry of a wedge tank into calm water in three degrees of freedom.
Applied Ocean Research
, 92
, Article 101920. 10.1016/j.apor.2019.101920.
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Abstract
The hydrodynamic problem of a two dimensional wedge tank filled with liquid entering a calm water surface is analysed based on the incompressible velocity potential theory. The motion effect of inner liquid on the entry process is investigated through comparison with the result containing equivalent solid mass or the liquid being frozen. The problem is solved through the boundary element method in the time domain. Two separated computational regions are constructed. One is the inner domain for the internal liquid, and the other is the outer open domain for the open water. The former is solved in the physical coordinate system, and the latter is solved in a stretched coordinate system. The solutions of two separated domains are connected through the motion of the body. The auxiliary function method is extended to decouple the nonlinear mutual dependence between fluid loads from two separated domains and the body motion. Detailed results for wedge motion, external impact pressure and free surface, and for internal pressure, free surface deformation and liquid motion are provided. Through comparison with the results of a wedge tank with frozen ice, in-depth discussion on the effect of the inner liquid is provided.
| Type: | Article |
|---|---|
| Title: | Free fall water entry of a wedge tank into calm water in three degrees of freedom |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.apor.2019.101920 |
| Publisher version: | https://doi.org/10.1016/j.apor.2019.101920 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Water entry of a wedge tank, Fully nonlinear boundary conditions, Boundary element method, Dual domain problem, Free fall motion in three degrees of freedom |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10082883 |
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