Smoothed particle hydrodynamics modeling and simulation of foundry filling process

A numerical model of foundry filling process was established based on the smoothed particle hydrodynamics (SPH) method. To mimic the constraints that the solid mold prescribes on the filling fluid, a composite treatment to the solid boundaries is elaborately designed. On solid boundary surfaces, boundary particles were set, which exert Lennard–Jones force on approaching fluid particles; inside the solid mold, ghost particles were arranged to complete the compact domain of near-boundary fluid particles. Water analog experiments were conducted in parallel with the model simulations. Very good agreement between experimental and simulation results demonstrates the success of model development.