3D WC-MPS coupled with geometrically nonlinear shell for hydro-elastic free-surface flows
| Autor: | Junior, Rubens Augusto Amaro, Neto, Alfredo Gay, Cheng, Liang-Yee |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | International Journal for Numerical Methods in Fluids 94 (2022) 1048-1081 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1002/fld.5083 |
| Popis: | A 3D fluid-structure interaction solver based on an improved weakly-compressible moving particle simulation (WC-MPS) method and a geometrically nonlinear shell structural model is developed and applied to hydro-elastic free-surface flows. The fluid-structure coupling is performed by a polygon wall boundary model that can handle particles and finite elements of distinct sizes. In WC-MPS, a tuning-free diffusive term is introduced to the continuity equation to mitigate non-physical pressure oscillations. Discrete divergence operators are derived and applied to the polygon wall boundary, of which the numerical stability is enhanced by a repulsive Lennard-Jones force. Additionally, an efficient technique to deal with the interaction between fluid particles placed at opposite sides of zero-thickness walls is proposed. The geometrically nonlinear shell is modeled by an unstructured mesh of six-node triangular elements. Finite rotations are considered with Rodrigues parameters and a hyperelastic constitutive model is adopted. Benchmark examples involving free-surface flows and thin-walled structures demonstrate that the proposed model is robust, numerically stable and offers more efficient computation by allowing mesh size larger than that of fluid particles. Comment: 48 pages, 19 figures |
| Databáze: | arXiv |
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