Simulation of wave–body interaction: A desingularized method coupled with acceleration potential. (January 2015)

• Record Type: Journal Article
• Authors: Wang, Lixian; Tang, Hui; Wu, Yanhua
• Is Part Of: Journal of fluids and structures. Volume 52(2015:Jan.)
• Page Start: 37
• Page End: 48
• Publication Date: 2015-01
• Subjects: Wave–body interaction -- Numerical wave tank -- Desingularized boundary integral equation method -- Acceleration potential; Fluid-structure interaction -- Periodicals; Fluid mechanics -- Periodicals; Structural dynamics -- Periodicals; Structural analysis (Engineering) -- Periodicals; 620.106
• DOI: 10.1016/j.jfluidstructs.2014.08.009
• Languages: English
• ISSNs: 0889-9746

Abstract

Abstract: A two-dimensional, potential-theory based, fully nonlinear numerical wave tank (NWT) is developed for the simulation of wave–body interaction. In this NWT, the concept of acceleration potential is adopted in addition to the velocity potential. Both potentials are solved using the desingularized boundary integral equation method (DBIEM). By tapping the strength of the DBIEM, a new acceleration-potential solving method is proposed, which turns the originally implicit kinematic boundary condition on the surface of a passively moving body into an explicit one. Unlike the other existing methods such as the mode decomposition method, the indirect method and the iterative method, the present method requires solving of only one boundary value problem to determine the acceleration potential, and hence significantly enhances the computational efficiency. Using this NWT, the nonlinear interaction between a freely floating barge and various incident waves is investigated. It is confirmed that the new acceleration potential solving method outperforms other existing methods, saving at least 45% of the computational time. Highlights: A 2D nonlinear numerical wave tank is developed for wave–body interaction study. The concept of acceleration potential is adopted. A new efficient acceleration-potential solving method is proposed. Potentials are solved using the desingularized boundary integral equation method. Interaction of a freely floating barge with various incident waves is investigated.