Water entry of a finite width wedge near a floating body |
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| Institution: | 1. School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China;2. Department of Mechanical Engineering, University College London, London, WC1E 7JE, UK;1. Department of Ocean Engineering, Amirkabir University of Technology, Tehran 15914, Iran;2. Department of Aerospace Engineering, Sharif University of Technology, Tehran 11115-8639, Iran;1. College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, PR China;2. Department of Mechanical Engineering, University College London, London WC1E 7JE, UK;3. School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China |
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| Abstract: | The problem of a two-dimensional finite-width wedge entering water near a freely floating body is considered through the velocity potential theory for the incompressible liquid with the fully nonlinear boundary conditions on the free surface. The problem is solved by using the boundary element method in the time domain. The numerical process is divided into two phases based on whether the interaction between the wedge and floating body is significant. In the first phase, when the single wedge enters water at initial stage, only a small part near its tip is in the fluid, the problem is studied in a stretched coordinate system and the presence of the floating body has no major effect. In the second phase, the disturbance by water entry of the wedge has reached the floating body, and both are considered together in the physical system. The auxiliary function method is adopted to decouple the nonlinear mutual dependence between the motions of the wedge and floating body, both in three degrees of freedom, and the fluid flow, as well as the interaction effects between them. Case studies are undertaken for a wedge entering water in forced or free fall motion, vertically or obliquely. Results are provided for the accelerations, velocities, pressure distribution and free surface deformation, and the interaction effects are discussed. |
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| Keywords: | Wedge entry near a floating body Boundary element method Coupled motion of multi-bodies Auxiliary function |
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