TITLE:
Comparison of the Effect of Tetrapod Block and Armor X block on Reducing Wave Overtopping in Breakwaters
AUTHORS:
Omid Nourani, Mehdi Behdarvandi Askar
KEYWORDS:
Wave Overtopping, Numerical Model, Tetrapod, X Block, Flow3D 10.1, Wave Collision
JOURNAL NAME:
Open Journal of Marine Science,
Vol.7 No.4,
September
29,
2017
ABSTRACT: As the Armor shape has a significant effect on the reduction of wave overtopping,
this study compares the performance of various shapes of concrete armored
blocks of X block and Tetrapod as the most suitable armors. In this
study, a three-dimensional numerical model was used for simulation of the
effects of waves on the armors of Tetrapod and X Block breakwaters. In this
regard, in order to calibrate the numerical model, a sample of conventional
stone armor has been selected and using available experimental data on the
design of armor such as wave overtopping, wave height, period of waves and
energy density of the required spectral range of wave verification was conducted
on a numerical model. In this regard, it is necessary to calibrate all the
conditions of the model including boundary conditions, numerical modeling,
initial conditions, numerical solvers and other parameters in the numerical
model and simulation error rate is determined. The maximum error of the
numerical model for the relative height values of the impact waves on the
structure of breakwater is 7.87% for different conditions. Accordingly, the
maximum error of the numerical model in determining overtopping values is
7.81%. The average fluctuation value of overtopping in the X block armor has
dropped by about 31% compared to the tetrapod armor.