3D MPS-MPS coupled FSI solver for simulation of hydroelastic fluid-structure interactions in coastal engineering

Abstract

In this paper, a 3D fully Lagrangian meshfree numerical solver for modeling of hydroelastic Fluid-Structure Interaction (FSI) phenomena is presented. Enhanced version of a projection-based MPS (Moving Particle Semi-implicit) fluid model is coupled with an MPS-based Newtonian structure model, resulting in 3D MPS-MPS coupled FSI solver. The Newtonian structure model is founded on conservation equations of linear and angular momenta corresponding to a linear elastic solid. The fluid-structure coupling is conducted by incorporating the FSA (Fluid-Structure Acceleration-based) scheme, where fluid-structure interface boundary conditions are precisely satisfied. The performance of the presented FSI solver is validated by conducting several benchmark test cases with analytical and experimental reference solutions. The solver is proven to possess notable robustness without use of any artificial stabilizers that often lead to unphysical numerical dissipations.