Numerical simulation of water entry problems considering air effect using a multiphase Riemann-SPH model

The water entry is a classic fluid-structure interaction problem in ocean engineering. The prediction of impact loads on structure during the water entry is critical to some engineering applications. In this paper, a multiphase Riemann-SPH model is developed to investigate water entry problems. In t...

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Bibliographic Details
Published in:Advances in aerodynamics 2021-05, Vol.3 (1), p.1-16, Article 13
Main Authors: Meng, Zi-Fei, Ming, Fu-Ren, Wang, Ping-Ping, Zhang, A-Man
Format: Article
Language:English
Subjects:
Aerospace Technology and Astronautics
Air effect
Air flow
Engineering
Fluid-structure interaction
Interfaces
Multiphase flow
Simulation
SPH
Velocity
Viscosity
Water entry
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Summary:The water entry is a classic fluid-structure interaction problem in ocean engineering. The prediction of impact loads on structure during the water entry is critical to some engineering applications. In this paper, a multiphase Riemann-SPH model is developed to investigate water entry problems. In this model, a special treatment, a cut-off value for the particle density, is arranged to avoid the occurrence of negative pressure. A remarkable advantage of the present multiphase SPH model is that the real speed of sound in air can be allowed when simulating water-air flows. In the present work, considering the air effect, several typical water entry problems are studied, and the evolution of multiphase interface, the motion characteristic of structure and complex fluid-structure interactions during the water entry are analyzed. Compared with the experimental data, the present multiphase SPH model can obtain satisfactory results, and it can be considered as a reliable tool in reproducing some fluid-structure interaction problems.
ISSN:2524-6992
2524-6992
DOI:10.1186/s42774-021-00066-x