IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 6 - MARITIME HYDRAULICS AND COASTAL ENGINEERING : An Approach to Breakwater Design: Numerical Calculation of Flow Within Armour Units
An Approach to Breakwater Design: Numerical Calculation of Flow Within Armour Units
Author : Eugenio PuglieseCarratelli, Fabio Dentale, Giovanna Donnarumma and Rosaria Ester Musumeci
The paper provides some developments of a numerical approach (?Numerical Calculation of Flow Within Armour Units?, FWAU) to the design of rubble mound breakwaters. The hydrodynamics of wave induced flow within the interstices of concrete blocks is simulated by making use of advanced, but well tested,Computational Fluid Dynamics (CFD) techniques to integrate Reynolds Averaged Navier- Stokes equations.The structure is numerically modeled by overlapping individual three-dimensional elements and a fine computational grid is fitted so as to provide enough computational nodes within the f low paths. While computationally very heavy, FWAU is gaining ground (Xiang et al., 2012),(Altomare et al., 2012)due to its obvious advantages over the ?porous media" seeping flow approach currently used in m aritime CFD engineering practice, i.e. the possibility of accounting for the highly non stationary effects, the reducedneed of ad hoc calibration of filtration parameters andalso ? in perspective ? the evaluation of hydrodynamic forces on single blocks. FWAU however is not yet a fully mature technique, and in order to turn it into a practical design tool, a number of difficulties have to be overcome. In the first place a computational procedure has to be developed to allow for the construction of the virtual breakwater from a database of block shapes; in the second place, enough evidence has to be collected or produced to validate FWAU against experimental results. While the first aspect has been accomplished by making use of current Computer Assisted Design (CAD) software, validation is still an open problem, since dynamical parameters within the blocks cannot be easily measured. A wealth of experimental results is however available on parameters such as run-up, reflection and global stability of rock mounds; the paper presentsrecentresultsabout this validation, as well as insight into fluid dynamical aspects.
File Size : 1,431,986 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 19/07/2016
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