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INNOVATIVE NUMERICAL SIMULATION TO STUDY THE FLUID MOTION WITHIN RUBBLE MOUND BREAKWATERS AND THE ARMOUR STABILITY

INNOVATIVE NUMERICAL SIMULATION TO STUDY THE FLUID MOTION WITHIN RUBBLE MOUND BREAKWATERS AND THE ARMOUR STABILITY,F. Dentale,S. D. Russo,E. Pugliese

INNOVATIVE NUMERICAL SIMULATION TO STUDY THE FLUID MOTION WITHIN RUBBLE MOUND BREAKWATERS AND THE ARMOUR STABILITY  
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The paper provides some results of a new procedure, developed to analyze the hydrodynamic aspects of the interactions between maritime emerged breakwaters and waves, by integrating CAD and CFD software. The filtration of the fluid within the interstices of a concrete blocks breakwater, is evaluated by integrating the Reynolds Averaged Navier-Stokes equations (RANS) inside the voids rather than making use of the widespread "porous media" approach, such as for example in Hsu et al (2002) and Lara et al (2006). The structure is thus modelled, very much like in the real world or in the physical laboratory testing, by overlapping individual three-dimensional elements (Accropode TM , Core-loc TM , Xbloc ® ), and then the computational grid is fitted so as to provide enough computational nodes within the flow paths. This approach is meant to match closely the physical laboratory test procedure, and it is oriented at analyzing the hydrodynamic aspects of the phenomenon (overtopping, breaking, run-up, reflection) as well as the stability of armour elements.
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