scispace - formally typeset
Search or ask a question
Topic

Wave flume

About: Wave flume is a research topic. Over the lifetime, 1627 publications have been published within this topic receiving 23335 citations.


Papers
More filters
27 Feb 2015
TL;DR: In this article, the velocity moments under wave action in the perpendicular direction to the coastline are studied by means of a non-hydrostatic model SWASH and a decomposition technique.
Abstract: The cross-shore sediment transport is of great importance in the coastal water since it may lead to significant change of coastal profile Many researches have proved that the sediment transport is proportional to velocity moments In this study, the velocity moments under wave action in the perpendicular direction to the coastline are studied by means of a non-hydrostatic model SWASH and a decomposition technique The purpose of this project is to perform the velocity moments which contribute to the cross-shore sediment transport with a numerical analysis and the most significant components can be found through the comparisons These contributed flows to the velocity moments, namely the asymmetric oscillatory flow, wave grouping-induced flow and undertow, are the major objects to be studied A set of measurements of wave flume experiment are adopted to evaluate the feasibility of the method developed in this study Firstly, a series of sensitivity analysis of wave decay and mean velocity are presented to investigate the influence of varied settings in SWASH, including the vertical resolution, boundary imposition, bottom friction, discretization schemes for advection terms and water depth in velocity points The results indicate that predictions of SWASH with proper settings are in good agreement with measurements in terms of wave decay and vertical velocity Furthermore, a detailed analysis is subsequently conducted with regard to surface elevation, wave decay and undertow Most of the SWASH predictions are in relatively good agreement with the measurements, but some deviations occurred after wave breaking This is probably associated to the absence of the production of turbulent energy due to surface roller A signal decomposition technique is applied to separate the signals with different frequencies Through the decomposition process, the long and short wave flows are separated by means of filtering out the other part The SWASH predicted central odd moments of long wave flows is relatively underestimated while the long wave flow variances and the central odd moments of asymmetric flows agree well to the observations This may correspond to the loss of signal information after decomposition By summing up the contributions of undertow, wave grouping-induced long wave flow and asymmetric oscillatory flow, the total odd flow moment is easily acquired Generally, the offshore-directed undertow is the dominant component, the shoreward asymmetric flow is of secondary importance and the contribution of long wave flow is relatively small As a consequence, the resulted total flow carries the sediment transporting seaward In overall, SWASH is capable of simulating the wave decay and vertical flow structure correctly However, some deviations near the breaking point implies that, the implementation of breaking-induced turbulence in SWASH is of great importance

2 citations

Proceedings ArticleDOI
21 Oct 2015
TL;DR: In this paper, a virtual wave tank is simulated where wave motions can be excited from either side, and wave focusing is observed at the tank center, where the waves interfere, as a measure of the interference, the wave heights that result from focusing are presented.
Abstract: Smoothed particle hydrodynamics (SPH) is used to simulate hydrodynamic waves and wave phenomena including focusing from wave interference. This Lagrangian based method can be used to naturally simulate hydrodynamic free surfaces, including the free surface of a breaking wave. A virtual wave tank is simulated where wave motions can be excited from either side. Wave focusing is observed at the tank center, where the waves interfere. As a measure of the interference, the wave heights that result from focusing are presented. Certain types of wave focusing are thought to lead to large ocean waves. The efficacy of SPH in modeling wave focusing is critical to further understanding and predicting extreme wave phenomena with SPH.Copyright © 2015 by ASME

2 citations

Journal ArticleDOI
TL;DR: In this paper, a new parameterization for calculating the nonlinear near-bed wave orbital velocity in the shallow water was presented, based on field data from Egmond Beach in the Netherlands, the correction coefficient and maximum skewness were determined as functions of the Ursell number.
Abstract: A new parameterization for calculating the nonlinear near-bed wave orbital velocity in the shallow water was presented. The equations proposed by Isobe and Horikawa (1982) were modified in order to achieve more accurate predictions of the peak orbital velocities. Based on field data from Egmond Beach in the Netherlands, the correction coefficient and maximum skewness were determined as functions of the Ursell number. The obtained equations were validated against measurements from Egmond Beach, and with laboratory data from small-scale wave flume experiments at Delft University of Technology and from large-scale wave flume experiments at Delft Hydraulics. Inter-comparisons with other previously developed parameterizations were also carried out. The model simulations by the present study were in good agreement with the measurements and have been improved compared to the previous ones. For Egmond Beach, the root-mean-square errors for the peak onshore (uc) and offshore (ut) orbital velocities were approximately 21%. The relative biases were small, approximately 0.013 for uc and −0.068 for ut. The coefficient of determination was in the range between 0.64 and 0.68. For laboratory experiments, the root-mean-square errors in a range of 7.2%–24% for uc, and 7.9%–15% for ut.

2 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigate the wave transformation processes over an idealized reef model and find that the relationship between the wave set-up and the wave period is complex, influenced by the reef-top structure.
Abstract: The wave transformation over the deep-sea coral reefs is an essential issue in the analysis of the reef ecosystem and the design of large reef-top structures Extensive wave flume experiments are conducted to investigate the wave transformation processes over an idealized reef model Detailed measurements of the wave height, the wave set-up and the wave-generated flow on the reef-top are made with and without the reef-top structure at various submerged depths and under different wave conditions It is found that the reef-top structure has a significant influence on the wave breaking, the wave set-up and the wave-generated flow The wave set-up increases with the increasing wave height and the decreasing submergence depth However, the relationship between the wave set-up and the wave period is complex, influenced by the reef-top structure

2 citations

Journal ArticleDOI
TL;DR: Wave flume tests demonstrate that both the RID and FHP systems are effective in reducing the heave motion of SSP, however, compared to the FHP, the RIDs system showed a much better control performance with a very small physical mass.

2 citations


Network Information
Related Topics (5)
Water flow
82.5K papers, 912.5K citations
76% related
Sediment
48.7K papers, 1.2M citations
74% related
Drag
43.8K papers, 769.2K citations
73% related
Sea ice
24.3K papers, 876.6K citations
73% related
Turbulence
112.1K papers, 2.7M citations
73% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202331
202284
202165
202069
201964
201859