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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Water engineering : Hydrodynamic performance characteristics of double vertical slotted wall breakwaters
Hydrodynamic performance characteristics of double vertical slotted wall breakwaters
Author : Hany Ahmed1, 2Anderias Schlenkoff2 & Mohamed Ibrahim3
The present paper investigates the hydrodynamic performance characteristics of a pair of vertical slotted wall, which can
be used as a permeable breakwater to protect the harbor and coastal areas. The proposed permeable breakwater model
consists of a pair of identical vertical slotted walls with an impermeable upper and lower part, where the draft is a decimal
multiple of the total depth. The middle part is permeable with a porosity of 50%. The second barrier is located at distances
of 0.25, 0.5, 0.75 and 1.00 times of the wave length from the first one. For regular waves, using the Eigen function
expansion method and the boundary condition at the breakwater, a semi-analytical model has been used to compute a
wave transmission, reflection and energy dissipation coefficients. Laboratory experiments are conducted for the model of
various values of structural parameters and wave period. Extensive studies using a numerical model (FLOW-3D, VOF)
have been conducted to detect the influence of the chamber width. The laboratory experiments have been performed to
assess both of the numerical and the semi-analytical model. A good agreement between experimental results and both of
the numerical and semi-analytical results has been shown and the results indicate the applicability of the numerical model
and semi-analytical to discover of the wave behavior through permeable breakwater. It is also of interest to compare the
hydraulic performance of a single slotted wall with a pair of them to improve the benefits of using the second wall.
File Size : 1,063,582 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Water engineering
Date Published : 20/08/2015
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