TY - JOUR
T1 - Experimental study and numerical simulation of mean longshore current for mild slope
AU - Liangduo, Shen
AU - Qinqin, Gui
AU - Zhili, Zou
AU - Lulu, He
AU - Wei, Chen
AU - Mingtao, Jiang
PY - 2020/12
Y1 - 2020/12
N2 - In this paper, experimental and numerical studies were performed to investigate the characteristics of longshore current under two mild slopes, the results of which may complement the existing studies, which have mainly focused on steep slopes. The experimental results revealed that the average velocity distribution of the longshore current was significantly different under the two different mild slopes. Under the slope of 1:100, the distribution of the averaged longshore current velocity had a downward concave trend at the nearshore side, while under the slope of 1:40 the trend became convex. In addition, the analysis of the numerical results showed that the distribution of the averaged longshore current velocity was affected by the distribution of the wave height within the surf zone and the bottom friction equations, with the influence of the latter being more significant. For the slope of 1:100, the cross-shore variability of alongshore variability can be calculated using the flow-type bottom friction equation, while for the slope of 1:40, the wave-type bottom friction equation can be used instead. Finally, the secondary breaking wave heights for mild slopes and the distribution of wave set-up are also shown in the study.
AB - In this paper, experimental and numerical studies were performed to investigate the characteristics of longshore current under two mild slopes, the results of which may complement the existing studies, which have mainly focused on steep slopes. The experimental results revealed that the average velocity distribution of the longshore current was significantly different under the two different mild slopes. Under the slope of 1:100, the distribution of the averaged longshore current velocity had a downward concave trend at the nearshore side, while under the slope of 1:40 the trend became convex. In addition, the analysis of the numerical results showed that the distribution of the averaged longshore current velocity was affected by the distribution of the wave height within the surf zone and the bottom friction equations, with the influence of the latter being more significant. For the slope of 1:100, the cross-shore variability of alongshore variability can be calculated using the flow-type bottom friction equation, while for the slope of 1:40, the wave-type bottom friction equation can be used instead. Finally, the secondary breaking wave heights for mild slopes and the distribution of wave set-up are also shown in the study.
KW - Energy dissipation
KW - Longshore current
KW - Mild slope
KW - Velocity distribution
KW - Wave breaking
UR - http://www.scopus.com/inward/record.url?scp=85089843197&partnerID=8YFLogxK
U2 - 10.1016/j.wavemoti.2020.102651
DO - 10.1016/j.wavemoti.2020.102651
M3 - Article
AN - SCOPUS:85089843197
SN - 0165-2125
VL - 99
JO - Wave Motion
JF - Wave Motion
M1 - 102651
ER -