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

Advances in Aerodynamics - Tập 3 Số 1 - 2021
Zi-Fei Meng1, Fu-Ren Ming1, Pingping Wang1, A‐Man Zhang1
1College of Shipbuilding Engineering, Harbin Engineering University, Harbin, China

Tóm tắt

AbstractThe 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.

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Advances in Aerodynamics

Tập 3 Số 1

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