Numerical Investigation on Water Entry of Two-dimensional Wedges with a Moving Particle Semi-implicit Method

Abstract

The water entry problem is an important issue in the field of marine engineering, and predicting the behavior of a body entering water is extremely difficult because of water’s strong nonlinearity. In this study, we investigate hydrodynamic load acting on a two-dimensional (2D) wedge during water entry. The adopted approach is the moving particle semi-implicit (MPS) method, which is widely utilized in the simulation of nonlinear free surface flow. Moreover, two techniques to enhance the performance of MPS are suggested and a symmetry domain technique for reducing the computational cost is also proposed. Additionally, a fluid–solid coupling algorithm using the MPS method is suggested. Several cases are numerically investigated to verify the proposed method, and its performance is verified through the simulation of hydrostatic pressure and dam break. Furthermore, 2D wedge water entry problems with symmetric or asymmetric characteristics are studied using the proposed MPS method and compared with some experimental and previous numerical studies. The results show that the MPS with the proposed schemes can provide a reliable numerical prediction for water entry problems.

Keywords

Water entry / Moving particle semi-implicit method / Hydrodynamic load / Free falling / Fluid–solid coupling

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Harbin Engineering University and Springer-Verlag GmbH Germany, part of Springer Nature