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

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. • Proposition of Virtual Grating (VG) to replace conventional modeling of inclined slats in particle methods. • VG models the grating with an array of inclined slats as control volume and based on its physical effects on the flow. • Good prediction of hydrodynamics loads with drastic reduction of computational cost. • Practical and efficient tool to simulate multi-scale problem of grating with inclined slats under wave impacts. • Investigation of the effectiveness of the grating structures as wave energy dampers. [ABSTRACT FROM AUTHOR]