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Wave flume

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


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Journal Article
TL;DR: In this article, a slat wave machine was used to simulate the ebb-tide flow from a tidal inlet into a constant depth ocean and the effect of such a flow on an incoming wave.
Abstract: A laboratory investigated was conducted of the propagation of waves on an adverse three-dimensional jet. The problem which was simulated was the ebb-tide flow from a tidal inlet into a constant depth ocean and the effect of such a flow on an incoming waves. The following major conclusions may be drawn from this study: 1. A slat type wave machine which permits flow through the wave generator plate appears to work well for such a study of wave-current interactions. The performance of the generator is described reasonably well by an available theory. 2. The jet discharge from a channel located asymmetrically in the flume appears to agree reasonably well with results for a two-dimensional symmetric turbulent jet. 3. The experimental arrangement used controls the jet discharge by the use of the training wall, and in this manner allows for the isolation of certain aspects of he problem. 4. Even fro small ratio of the average velocity at the channel exit to the wave celerity, i.e., less than 10%, the incident wave height with the adverse current is more than twice what it is without the current. 5. In the region seaward of the channel exit a wave maximum occurs caused primarily by the effects of refraction. 6. The wave height decreases significantly as waves propagate up the channel for the case with an adverse current. This effect apparently is not due to friction. 7. There is a significant lateral variation of wave height across the flume caused by the jet which may be due to both wave refraction and the shoreward velocities induced by the effects of the entertainment of the ambient fluid by the jet which discharges from the channel exit.

2 citations

Proceedings ArticleDOI
06 Sep 2006
TL;DR: In this paper, a numerical model which includes a multi-layered visco-elastic-plastic model to predict the wave attenuation under regular waves due to muddy bed is presented.
Abstract: When surface water waves travel over a soft mud bed, an inter- surface wave between the water layer and the mud layer is generated resulting to high wave attenuation and mass transport in mud layer. The present paper offers a numerical model which includes a multi-layered visco-elastic-plastic model to predict the wave attenuation under regular waves due to muddy bed. The model is based on mild slope equations and it includes combined wave refraction, diffraction, reflection, breaking and wave attenuation due to fluid mud layer. An artificial neural network is used as a part of wave attenuation calculation to speed up the computation. Applying the model in the East Bay, Louisiana shows a reasonable agreement with wave height measurement.

2 citations

Journal ArticleDOI
TL;DR: Yang et al. as mentioned in this paper investigated the sediment transport over rippled bedforms through a series of laboratory experiments with different combinations of bed slope, grain size, wave conditions and water level using a 2D wave flume.
Abstract: Yang, Z.T.; Li, H.J.; Liang, B.C.; Lee, D.Y.; Pan, X.Y., and Xu, Y., 2016. Laboratory experiment on the bed load sediment transport over rippled bed. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings of the 14th International Coastal Symposium (Sydney, Australia). Journal of Coastal Research, Special Issue, No. 75, pp. 497–501. Coconut Creek (Florida), ISSN 0749-0208. Bed load sediment transport over rippled bedforms was investigated through a series of laboratory experiments with different combinations of bed slope, grain size, wave conditions and water level using a 2D wave flume. In addition to the measurement of surface waves and velocity, the water surface and bottom bed elevation were precisely monitored using video cameras to record the continuous processes of profile evolution, including ripple formation and migration under the assumption of longshore uniformity. The bed load sediment transport flux associated with ripple migration was then estimated....

2 citations

01 Dec 1993
TL;DR: In this article, expressions for the motion of a waveboard to generate a correct second-order wave field were found for both regular and irregular waves, and two important features of the procedure adopted here are that the computing time for the waveboard is signifcantly smaller compared to a method based on the frequency domain and the accuracy of the physical representation increases with decreasing spectral width.
Abstract: The correct generation of a second order wave field in a laboratory wave tank is of importance in several experimental investigations, particularly those of nonlinear evolutions and sediment transport. In the present work, which was carried out under the MLTP (medium long-term planning) of DELFT HYDRAULICS for improving experimental techniques, expressions are found for the motion of a waveboard to generate a correct second order wave field. These expressions are valid for both regular and irregular waves. Two important features of the procedure adopted here are that the computing time for the motion of the waveboard is signifcantly smaller compared to a method based on the frequency domain and that the accuracy of the physical representation increases with decreasing spectral width. The assumption of a narrow band spectrum is sufficient for realistic sea states described by spectral shapes of JONSWAP and Pierson-Moskowitz types. Results of some experimental investigations into the performance of the software based on the wave generation theory are also included in the report. Although the overall agreement between the theory and the experiment is good, some discrepancies are apparent from the limited analysis carried out so far, all of which cannot be attributed to the wave generation theory. Further analysis (and possibly a set of new experiments) is required in order to resolve aH the discrepancies.

2 citations

Journal ArticleDOI
TL;DR: In this article, the performance of rigid and elastic plates when exposed to regular waves and quantifying the energy loss attributed to elasticity has been investigated for the wave flume experiments.
Abstract: The focus of this research work is towards the understanding of the hydraulic and hydrodynamic performance of submerged rigid and elastic plates when exposed to regular waves and quantifying the energy loss attributed to elasticity For this purpose, four different plates with different flexural rigidities have been chosen for the wave flume experiments for studying the hydroelastic problem over a range of rigidity parameters Furthermore, variation of pressures, reflection and transmission characteristics due to regular waves acting on flexible plate were investigated Based on the systematic experimental study and investigation of the results it was found that the elasticity in the plate significantly improves the performance of the horizontal plate as a wave barrier in the lower B/L (Relative plate width) region where the rigid plate is not effective The enhancement in energy loss due to higher harmonic generation is about 20-30%

2 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202331
202284
202165
202069
201964
201859