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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Flood risk management and adaptation : Wave overtopping numerical simulation using openfoam
Wave overtopping numerical simulation using openfoam
Author : KARAGIANNIS N.(1), KARAMBAS TH.(2) & KOUTITAS CHR.(3)
ABSTRACT
A numerical model has been developed and implemented with the open source toolbox OpenFoam and the additional
toolbox waves2Foam (Jacobsen et al. 2012), in order to investigate the wave overtopping physical process on inclined
impermeable structures. RANS (Reynolds averaged Navier Stokes) equations are solved in conjunction with the k- SST
turbulence model ones, while VOF (Volume of fluid) method is used to track the free surface. Surface elevation and depth
averaged velocities are obtained from the model and the average overtopping rate is calculated and compared to semiempirical
formulae from literature. Iribarren number as a criterion of breaking waves, the slope angle, freeboard in relation
to wave height, and the wave steepness are the most important factors which determine the average overtopping rate.
According to Kofoed (2002), a slope of 1:1.73, namely 30o angle, is considered optimal for the wave overtopping and that
angle is implemented in the model. A wave steepness of around 0.033 is regarded as optimal for the maximum
overtopping rate as well. Extended investigation on wave characteristics and freeboard was made and the results, which
are in good agreement with empirical formulae, are presented herein.
File Size : 722,137 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Flood risk management and adaptation
Date Published : 14/08/2015
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