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Stabilized BEM-MEL for fully nonlinear wave-body interactions using a mesh adjustment velocity

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Abstract

The conventional wave-body interaction analysis method, which uses the boundary element and Lagrangian time evolution methods (BEM-MEL), can cause numerical instability, and several solutions have been proposed. In this study, we propose a new method for removing mesh distortion using the mesh adjustment velocity and putting the nodes on the correct Neumann boundary surface using the clinging velocity. The stability of the proposed method and the convergence of present results to the experimental results were investigated. The simulation is well stabilized using the present method, allowing for a large time step in the initial value problem. Furthermore, the calculation results agree well with previous experimental and numerical results. The proposed method enables BEM-MEL to simulate violent phenomena efficiently and expands the scope of BEM-MEL application.

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Authors and Affiliations

  1. Department of Systems Design Engineering, Akita University, 1-1 Tegatagakuenmachi, Akita, 010-8502, Akita, Japan

    Tomoaki Hirakawa

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  1. Tomoaki Hirakawa
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Correspondence to Tomoaki Hirakawa.

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Hirakawa, T. Stabilized BEM-MEL for fully nonlinear wave-body interactions using a mesh adjustment velocity. J Mar Sci Technol 28, 496–505 (2023). https://doi.org/10.1007/s00773-023-00936-7

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  • DOI: https://doi.org/10.1007/s00773-023-00936-7

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