Coupled Lattice Boltzmann and Discrete Element Simulations of Ship-Ice Interactions
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- Watanabe, Seiya
- Research Institute for Applied Mechanics, Kyushu University
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- Hu, Changhong
- Research Institute for Applied Mechanics, Kyushu University
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- Aoki, Takayuki
- Global Scientific Information and Computing Center, Tokyo Institute of Technology
Description
Evaluating ice loads acting on ships is essential for the safety of ships navigating in ice-covered seas. In this study, we develop a CFD method to handle ship, ice, and fluid interaction. The lattice Boltzmann method, capable of large-scale calculations, is applied to the simulation of free-surface fluids. The ice motion is computed by solving the equations of motion of a rigid body, and the discrete element method models the ice-ice and ice-ship contact interactions. A momentum exchange scheme couples the lattice Boltzmann method and particle-based rigid body simulation. We introduce tree-based adaptive mesh refinement and multiple GPU computing to improve grid resolution and computational time. The proposed method is applied to model scale simulations of ship navigation in a brash ice channel. Simulations were performed for various conditions with different ice concentrations and ship velocities, and we observed that ice resistance increased with the ice concentration and the ship velocity increased. The ice motions and resistances obtained from our simulations are reasonable compared to model equations of Finnish-Swedish ice class rules (FSICR) and numerical analyses of a previous study.
Journal
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- IOP Conference Series: Materials Science and Engineering
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IOP Conference Series: Materials Science and Engineering 1288 012015-, 2023-08-09
IOP Publishing
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Details 詳細情報について
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- CRID
- 1050300755726081280
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- ISSN
- 1757899X
- 17578981
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- HANDLE
- 2324/7183292
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- Article Type
- conference paper
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- Data Source
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- IRDB