TY - GEN
T1 - A methodology for measuring the velocity and thickness of wave-induced up-rushing jets on vertical seawalls and superstructure
AU - Shiravani, Gholamreza
AU - Vousdoukas, Michalis
AU - Schimmels, Stefan
AU - Stagonas, Dimitris
N1 - Funding Information:
The authors gratefully acknowledge the support of the European Community's 7th Framework Programme through the grant to the budget of the Integrating Activity HYDRALAB IV, Contract no. 261520. The cooperation of FZK staff in design and installation of experimental apparatus is gratefully acknowledged. The last author would also like to acknowledge Dr Gerald Muller’s contribution to the development of the idea and the design of the experiments.
PY - 2014/10/30
Y1 - 2014/10/30
N2 - Waves breaking on vertical seawalls result in up-rushing water jets with high velocities, which in turn lead to large overtopping rates and pose a serious threat to pedestrians, vehicles or any infrastructure in the vicinity of the seawall. Nevertheless, knowledge on the characteristics, namely the velocity and thickness, of such jets is scarce. Based upon recent experiments in the Large Wave Flume (Großer Wellenkanal, GWK) of Forschungszentrum Küste (FZK) the current paper proposes a semi-automated methodology for measuring velocity and thickness of up-rushing jets. The methodology was applied on cases considering waves ranging from nonbreaking to nearly and strongly breaking and yielded encouraging results. With regards to the velocities a good repeatability is reported for non-breaking waves, while for breaking waves velocities are, as anticipated, observed to depend on the intensity of breaking. When the thickness is concerned, user based decisions are required as the selection process is drastically affected by the increased air content of the up-rushing jet.
AB - Waves breaking on vertical seawalls result in up-rushing water jets with high velocities, which in turn lead to large overtopping rates and pose a serious threat to pedestrians, vehicles or any infrastructure in the vicinity of the seawall. Nevertheless, knowledge on the characteristics, namely the velocity and thickness, of such jets is scarce. Based upon recent experiments in the Large Wave Flume (Großer Wellenkanal, GWK) of Forschungszentrum Küste (FZK) the current paper proposes a semi-automated methodology for measuring velocity and thickness of up-rushing jets. The methodology was applied on cases considering waves ranging from nonbreaking to nearly and strongly breaking and yielded encouraging results. With regards to the velocities a good repeatability is reported for non-breaking waves, while for breaking waves velocities are, as anticipated, observed to depend on the intensity of breaking. When the thickness is concerned, user based decisions are required as the selection process is drastically affected by the increased air content of the up-rushing jet.
KW - Breaking waves
KW - Recurve/parapet
KW - Up-rushing jet velocity
KW - Vertical seawall
UR - https://www.scopus.com/pages/publications/84957629941
U2 - 10.9753/icce.v34.waves.48
DO - 10.9753/icce.v34.waves.48
M3 - Conference contribution
AN - SCOPUS:84957629941
T3 - Proceedings of the Coastal Engineering Conference
BT - Proceedings of the 34th International Conference on Coastal Engineering, ICCE 2014
A2 - Lynett, Patrick
PB - American Society of Civil Engineers (ASCE)
T2 - 34th International Conference on Coastal Engineering, ICCE 2014
Y2 - 15 June 2014 through 20 June 2014
ER -