Numerical study on slamming characteristics of an elastic wedge based on a two-way coupled finite volume and modal superposition method

Abstract

In marine engineering, fluid–structure interaction (FSI) problems caused by wave impact are prevalent and often accompanied by violent free-surface changes. To accurately capture the free-surface and optimize the solution strategy for FSI problems, this study proposes a solver (overInterISODyMFoam) that combines isoAdvector and overset for refined free-surface capturing and a partitioned approach that couples finite volume and modal superposition (FVMS) based on the preCICE platform for solving FSI wave impact problems. The performance of solver and the FVMS method are verified by comparing them to the experimental results of a 20° wedge entering the water. The results indicated that the free-surface capturing method proposed can achieve a sharper interface than the Multidimensional Universal Limiter with Explicit Solution method and exhibits less numerical dissipation at the spray front. As a three-dimensional two-way coupled method, the calculations of FVMS method are in good agreement with the experimental results. The average error for the pressure and stress peaks is approximately 5.60% and 4.52%, respectively. The FVMS method shows better applicability than the two-dimensional (2D) one-way coupled method. Due to the ignored elasticity effect, the slamming pressure peak and stress peak calculated by the 2D one-way coupled method are approximately 4%–11% and 6%–23% higher than the experimental results, respectively.