In recent decades, computational simulations have played a key role in engineering. Designers and companies increasingly require software with greater precision and accuracy, able to deal with an ever-increasing spectrum of physical phenomena. This has prompted programmers not only to improve and update the already pre-existing ones but to develop new approaches and methodologies, capable of overcoming the limitations of previous technologies. In this context, SPH represents a completely alternative method to those commonly used until now, like CFD, because of its Lagrangian approach and meshless features. In particular, the most interesting aspect concerns its ability to reproduce free surface monophase and multiphase flows and high-speed dynamics.