Experimental studies of groupiness variations of waves propagating over a submerged curvilinear sill
Groupiness variations of irregular waves propagating over a submerged sill and the effects of depth-uniform currents on it are studied by detailed laboratory measurements. Groupiness factor (GF) based on the local wavelet energy density is used in this research to describe the groupiness degree of waves and the stability of the GF is also discussed. The results show that the breaking event can alter waves groupiness essentially. For all tested cases, before wave breaking or blocking event happens, GF does not vary significantly. After wave breaking, however, the groupiness decreases rapidly. The groupiness on the condition of the following current is higher than that without current present during the whole propagation process. And under the opposing current condition, the groupiness is higher than that in the pure wave condition before wave breaks, and decreases more rapidly than that under pure wave conditions after wave breaking.
groupiness groupiness factor wave-current interaction wavelet transform local wavelet energy density
Y.X.Ma X.Z.Ma G.H.Dong
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China
国际会议
The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)
上海
英文
2007-08-15（万方平台首次上网日期，不代表论文的发表时间）