A new model to solve fluid–hypo-elastic solid interaction using the smoothed particle hydrodynamics (SPH) method

Adaptability is the most attractive feature of the smoothed particle hydrodynamics (SPH) method. Therefore it can naturally handle problems with extremely large deformation. Fluid–structure interaction (FSI) problems are placed in this category. In FSI problems, using a good contact algorithm is necessary to achieve fidelity of the results. This paper presents a new numerical simulation based on the SPH method for FSI problems. The main contribution of this work is proposing new algorithms to model the contact between a viscous fluid and hypo-elastic solid particles. In the proposed contact model, the interpenetrations of fluid and solid particles are prevented by introducing a repulsive force and new intermediate particles. The validity of the proposed algorithms is verified, and in order to show their ability several examples are solved.