ECCOMAS Congress 2016 VII European Congress on Computational Methods in Applied Sciences and Engineering M. Papadrakakis, V. Papadopoulos, G. Stefanou, V. Plevris (eds.) Crete Island, Greece, 5–10 June 2016 A NUMERICAL INVESTIGATION OF LIQUID IMPACT ON PLANAR SURFACES Giacomo Viccione 1 , Vittorio Bovolin 1 , and Eugenio Pugliese Carratelli 2 1 Department of Civil Engineering, University of Salerno, 84084, Fisciano, Italy e-mail: {gviccion,v.bovolin}@unisa.it 2 InterUniversity Centre for the Prediction and Prevention of Major Hazards (C.U.G.RI.), 84084, Fisciano, Italy epc@unisa.it Keywords: Fluid Structure Interaction, Computational Fluid Dynamics, Liquid Impact, Free Surface Flows, Smoothed Particle Hydrodynamics, Volume of Fluid. Abstract. The impact of a free surface liquid flow on planar surfaces is a common occur- rence and a challenging issue in many research fields. There are many situations in science and technology where this field of study finds related applications: the falling objects on a liquid surface, sloshing dynamics, flow run-up and overtopping, the action of train waves on maritime structures. Under certain circumstances, the impact process may result into high, spatially localized pressure peaks, thus inducing dangerous solicitations. The present work focuses on some relevant computational aspects of the fluid impact on inclined planar surfac- es, making use of the Weakly Compressible Smoothed Particle Hydrodynamics (WCSPH) La- grangian technique. With reference to the early stages of the impact process, pressure distribution is described as function of the incident wave’s features and the angle of incidence of the solid surface assumed. Results are then discussed and compared with the correspond- ing ones obtained via Eulerian software. 627