Wave flume

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

Sediment transport in case of irregular non-breaking waves with a current

Abstract: Investigation to sediment transport rate in case of waves and currents, tests executed in the wave-current flume of the laboratory of Fluid mechanics of TU Delft. Sediment transport was measured using sand of 100 micron; comparison to similar tests with 200 micron sand.

Impact of extreme waves on a vertical wall

Abstract: This study addresses the impact of nonlinear wave evolution on the resulting wave force values on a vertical wall. To this end, the problem of interaction between non-breaking water waves and a vertical wall over constant depth is investigated. The investigation is performed using a two-dimensional wave flume model which is based on the high-order spectral method. Wave generation is simulated at the flume entrance by means of the additional potential concept. This model enables to preserve full dispersivity. Therefore, the model enables to examine the role of nonlinear evolution in the formation of extreme wave force values on a vertical wall for a wide range of water depths. The results for the force exerted on a vertical wall are presented for shallow and deep water conditions. In shallow water, extreme wave force values occur due to the formation of an undular bore. In deep water, extreme wave forces have been obtained as a result of disintegration process of incident wave groups into envelope solitons. Multiple maximum force values have been detected for each of the highest run-up peaks. This phenomenon has been introduced in shallow water conditions and is extended here for deep water conditions.

Beach Stabilization Using Drains—An Experimental Model Study

Abstract: The use of the drain concept may be an attractive new tool for beach stabilization because it provides an alternative to hard structures and may enhance beach nourishment practices. Two-dimensional model experiments are performed in a 32.6 m long, 0.91 m wide, 0.91 m deep wave flume equipped with a programmable wave generator capable of generating spectral waves to assess the effectiveness of the drain on beach stabilization for the condition of a negligible tide. An undistorted Froude model is used with a scale large enough to preserve breaking wave characteristics. Sediment properties are scaled using the fall time parameter H/wT. Beach profiles are recorded at intervals throughout the testing program. In addition, the water table under the beach face and pumping requirements are monitored. The initial phase of the present research consists of establishing onshore/offshore transport criteria. The drain is then utilized for four wave climates to assess the effect of the drain on rates of erosion/accretion. This is repeated for two locations of the drain. Results indicate that while the beach drain alters the swash/backwash cycle and beach face geometry, the use of the drain may not be effective for locations with a negligible tide.

Nonlinear Wave Diffraction by Submerged Horizontal Circular Cylinder

Abstract: This paper presents an experimental and numerical study of 2-D wave diffraction by a fixed horizontal-axis submerged circular cylinder. The objective of the paper is to report and validate results from the fully nonlinear 2-D boundary-element method code CANAL; to assess the capability of the physical wave flume and the measurement methodology to study this type of problem; and to contribute to the understanding of the wave diffraction by a circular cylinder. Two test cases are presented, both in deep-water conditions. The cylinder axis submergence is 1 5r (r is the cylinder radius) for the first case, and 3r for the second, the latter corresponding to the experimental study presented in the paper. A discretization convergence evaluation is also presented for the second case. The good agreement between the numerical and the experimental results proves that this numerical model is able to accurately simulate this type of problems. No reflection was noticed on the incident wave side of the cylinder. It was found that nonlinear resonant interactions occur between the fundamental frequency and the harmonics on the transmitted wave side of the cylinder. Free waves were observed on this part of the wave flume.