The main objective of submerged breakwaters is energy dissipation of
transmitted wave in leeward. In the present study, the capability of
FLOW-3D and MIKE21-BW software for modeling of these structures have
been investigated. In this regard, experimental results have been
considered as a criterion to analyse the results of this two software.
Comparison of numerical and experimental results revealed that FLOW-3D
provides better results than MIKE21. Therefore, FLOW-3D has been used to
investigate the effects of submerged breakwater geometry on wave
transmission. In doing so, the effect of main design parameters such as
shoreward slope, leeward slope, and the ratio of the width to the height
of the submerged breakwaters have been studied on transmission
coefficient. The results of this study show that the effect of shoreward
and seaward slopes on transmission coefficient is negligible; while they
considerably contribute to the wave reflection. Finally, the correlation
factor has been calculated to investigate the correlation of
dimensionless parameters with wave transmission coefficient.
Accordingly, the most correlated parameters to wave transmission
coefficient are the depth above breakwater crest to incident wave height
ratio (F/H) and relative depth of breakwater (F/d), and the least
correlated parameter is the breakwater slopes. The results of this study
can be used in better understanding of the influential parameters in
design as well as developing computation frameworks to study the
submerged structures in nearshore regions.