Onshore wind can significantly affect wave overtopping process and increase mean overtopping discharge. Thus, thewind should be an important variable in coastal design process. However, despite many researches have analyzed theinfluence of wind on the overtopping, there is still a lack of exhaustive knowledge about this phenomenon. To furtheranalyze the wind effects, the CFD model FLOW-3D has been used to investigate wave overtopping at vertical seawalls.The single-fluid approach has been adopted, i.e. the presence of wind has been simulated via the wind shear stress onthe sea surface. The main aim of this work is to verify the ability of this simplified numerical modelling to capture themacro-processes involved in the phenomenon of wave overtopping. The presence of wind shear stress has led tophysically consistent results. It confirmed that as the mean overtopping discharge decreases, as the wind effect increases.Furthermore, numerical results have shown that the advection of water droplets behind the structure by the wind is thekey mechanism for the enhancement of wave overtopping. Finally, by gathering numerical results and laboratory datacarried out by Durbridge (2021), a new predictive formula to estimate the wind factor is provided
THE EFFECT OF WIND STRESS ON WAVE OVERTOPPING ON VERTICAL SEAWALL / Tuozzo, S.; Di Leo, A.; Buccino, M.; Dentale, F.; Carratelli, E. P.; Calabrese, M.. - 37(2023). (Intervento presentato al convegno International Conference on Coastal Engineering nel Dicembre 2022) [10.9753/icce.v37.papers.49].
THE EFFECT OF WIND STRESS ON WAVE OVERTOPPING ON VERTICAL SEAWALL
Tuozzo S.
;Buccino M.;Calabrese M.
2023
Abstract
Onshore wind can significantly affect wave overtopping process and increase mean overtopping discharge. Thus, thewind should be an important variable in coastal design process. However, despite many researches have analyzed theinfluence of wind on the overtopping, there is still a lack of exhaustive knowledge about this phenomenon. To furtheranalyze the wind effects, the CFD model FLOW-3D has been used to investigate wave overtopping at vertical seawalls.The single-fluid approach has been adopted, i.e. the presence of wind has been simulated via the wind shear stress onthe sea surface. The main aim of this work is to verify the ability of this simplified numerical modelling to capture themacro-processes involved in the phenomenon of wave overtopping. The presence of wind shear stress has led tophysically consistent results. It confirmed that as the mean overtopping discharge decreases, as the wind effect increases.Furthermore, numerical results have shown that the advection of water droplets behind the structure by the wind is thekey mechanism for the enhancement of wave overtopping. Finally, by gathering numerical results and laboratory datacarried out by Durbridge (2021), a new predictive formula to estimate the wind factor is providedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
