| 研究実績の概要 |
There were two major aims considered for the proposed research.
1) Further development and refinement of a Lagrangian multiphase computational code for a more precise modeling of entrapped air dynamics in water slamming problems,
2) Proper coupling of the refined multiphase flow model with a non-linear elastic structure model to take into account the hydroelasticity effects for a more accurate reproduction of water slamming problems encountered in ocean engineering.
To achieve the first aim, efforts were focused on enhancement of stability/accuracy of the so-far developed computational particle methods for extension to multi-phase flows without the need of artificial density smoothing. In this regard, an Optimized Particle Shifting (OPS) scheme was developed. The energy conservation of best possible set of schemes was also extensively verified.
Regarding the second aim, corresponding to precise modeling of hydroelasticity, several efforts were made to develop advanced and accurate coupled computational methods to reproduce incompressible fluid-linear/non-linear elastic structure interactions including coupled MPS-MPS, MPS-HMPS, ISPH-SPH and ISPH-HSPH. A specific focus was devoted to precise modeling of fluid-structure interface boundary conditions. As continued efforts, more precise modelings of air-water-structure interfaces are to be targeted with implementation of developed enhanced mathematically-physically consistent schemes.
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