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SPH (Smoothed Particle Hydrodynamics) is a Lagrangian particle flow model used to calculate non hydrostatic flows. It is very well suited for situations with wave overtopping and violent interaction between flow and structures.

SPH is a fully Lagrangian method and does not need meshes. The particles in SPH carry all the flow quantities and move with their own velocity. No special treatment of the free surface is needed, it is simply the transition between an area with particles and without particles. SPH can be applied in 2D or 3D mode.

SPH has been applied for:

• Dam break problem
  
• Flow over a sharp weir
  
• Spilling waves on a beach (Iribarren = 0.3)
  
• Plunging waves on a beach (Iribarren = 0.5)