An Enhanced Coupled Lagrangian Solver for Incompressible Fluid and Non-linear Elastic Structure Interactions

Abstract

An enhanced fully-Lagrangian coupled solver is developed for modeling of Fluid-Structure Interaction (FSI) phenoma. The fluid solver provides solutions to the continuity and Navier-Stokes equations on the basis of the projection-based Moving Particle Semi-implicit (MPS) method. The structure solver is founded on the description of a non-linear hyper-elastic structure in the frame of a Hamiltonian system based on Hamilton's principle of least action. The fluid and structure solvers are properly coupled through a consistent coupling algorithm. Performance of the proposed solver is examined, by reproducing a dam break with an elastic gate and a dam break with an elastic plate. The results obtained from Hamiltonian MPS FSI model are also compared with those by a MPS FSI model that incorporates a linear-elastic structural solver.