A numerical modeling of wave-inclined slats interaction for particle methods

TL;DR

This paper introduces MPS-VG, a novel mesh-free modeling approach for simulating wave interactions with inclined slats in wave energy dampers, demonstrating improved efficiency and accuracy over traditional particle-based methods.

Contribution

The paper presents MPS-VG, a Virtual Grating model that accurately captures wave-slats interactions with reduced computational costs compared to conventional particle methods.

Findings

MPS-VG accurately predicts complex wave-structure interactions.

Horizontal gratings outperform vertical ones in wave energy damping.

The model significantly reduces processing time and memory usage.

Abstract

MPS-VG, a Virtual Grating (VG) model for the Lagrangian mesh-free Moving Particle Semi-implicit (MPS) method is proposed for replacing conventional particle-based solid modeling of gratings with a set of thin inclined slats. Unlike most approaches for perforated wave energy dampening devices, in which the flow through the device is simplified by pressure loss or damping effects without flow deflection, MPS-VG models the angular deviation caused by hydrodynamic impact on inclined slats. Both accuracy and computational performance of the model were checked through a simulation of wet dam break scenarios with the grating structures placed horizontally or vertically. The results were compared with those from fully particle-based modeling. MPS-VG correctly predicted complex wave-structure interactions using a relatively low-resolution model and significantly reduced processing time and memory storage compared to conventional particle-based MPS modeling. The evaluation of the performance of the gratings with inclined slats as wave energy dampers revealed the horizontal gratings outperformed the vertical ones. Therefore, qualitative and quantitative agreements strengthened the potential of MPS-VG as a practical and computationally efficient tool for the study of multi-scale phenomena of wave impacts on grating with inclined slats.