When studying the structural response of rubble mound breakwaters to wave loading, the knowledge of water surface fluctuations, pore pressure variations and related wave attenuation inside the porous structure is important since the pore pressures affect most responses, such as wave run-up, wave overtopping, reflections, transmission and the hydraulic and geotechnical stability of the breakwater. For this purpose a numerical model was developed to investigate the water surface and pressure fluctuations outside and inside the statically conventional rubble mound breakwater by using FLOW-3D software. The water - structure interaction is obtained by model to simulate the corresponding turbulence field and volume of fluid (VOF) theory to simulate the free surface. The comparison between numerical and experimental results shows a good agreement in terms of both water surface and pore pressure Fluctuations in conventional rubble mound breakwaters.

Keywords: Rubble mound breakwater, Numerical modeling, Water surface, Pressure, fluctuation

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