Topic
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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01 Sep 2002
TL;DR: In this article, a physical model study of wave refraction-diffraction at structures typically present at coastal inlets was conducted to provide data sets that would aid in the calibration and verification of numerical wave models.
Abstract: : ELECTRONIC FILE CHARACTERISTICS: 572 files; MS Word (DOC) and TXT PHYSICAL DESCRIPTION: 1 computer laser optical disc (CD-ROM); 4 3/4 in; 227 MB SYSTEMS DETAIL NOTE: IBM-clone PC-compatible ABSTRACT: This physical model study of wave refraction-diffraction at structures typically present at coastal inlets was conducted to provide data sets that would aid in the calibration and verification of numerical wave models The study was performed in the Coastal Inlet Research Program's (CIRP) idealized inlet experimental basin at the US Army Engineer Research and Development Center (ERDC), Coastal and Hydraulics Laboratory (CHL) Safe navigation, sediment transport into navigation channels, and shoreline erosion are all concerns at coastal inlets and are related to the transformation of waves as they change direction and height due to complex bathymetry and coastal inlet structures The idealized inlet physical model, created for inlet studies, provided a facility in which to make wave measurements of height and direction in enough detail to document wave diffraction and refraction Measurements of wave information included use of capacitive wave rods for wave height, acoustic-Doppler velocity sensors for wave direction, and new video-based wave direction measurement system Four idealized structural configurations were examined with two irregular Waves, 08 sec, 02 ft (61 cm), and 16 sec, 015 ft (46 cm), and one regular wave, 08 sec, 015 ft (46 cm) Structure 1 consisted of a shore-parallel breakwater with the wave generator creating shore-normal and 20-deg-angle waves Structure 2 was a typical dogleg jetty with shore-normal and 20-deg-angle waves Structure 3 was an unjettied inlet but included flood currents Structure 4 had parallel jetties at the inlet Structures 3 and 4 were concerned with wave transportation into the bay A total of 30 wave gauges were used to acquire data with 20 gauges placed on two movable racks for deployment into specified 7
10 citations
TL;DR: In this article, a series of laboratory experiments were conducted to measure the run-up heights on plane slopes and wave pressures on vertical structures resulting from solitary waves, which represent the characteristics of tsunamis well.
10 citations
TL;DR: In this paper, the effects of wave flume and wavemaker geometry on the minimum inertial wave pressure moment on the wavemaker flap better than tabular lookup methods are examined.
Abstract: Dimensionless theoretical design curves for hinged wavemakers of variable draft are extended, within the limits of linearized potential wave theory, to wave flume geometries consisting of two constant depth domains separated by a gradually sloping transition region. These design curves are examined for the following: hydrodynamic pressure moment, moment arm, relative moment phase angle, and the ratio of the wavemaker stroke to the propagating wave height. The dimensionless design curves are shown to demonstrate the effects of wave flume and wavemaker geometry on the minimum inertial wave pressure moment on the wavemaker flap better than tabular lookup methods. The effects of nondimensional wavemaker parameters on the dimensionless wavemaker power curves are explored, and they are compared to the energy flux in a propagating periodic wave. Convergence of the eigenfunction expansion for the wavemaker velocity for hinged wavemakers of variable depth is examined numerically.
10 citations
09 Dec 2016
TL;DR: In this paper, the authors examined the sand transport physics in the breaking and swash zones, through controlled experiments in a large-scale wave flume, using acoustic and conductivity-based measurement instruments.
Abstract: Long-term predictions of beach morphology using numerical models contribute to cost-effective coastal protection strategies. The physics of sand transport in the wave breaking region and the swash zone are not fully understood, leading to poor predictive capability of existing sand transport models for these regions. The aim of this thesis is therefore to examine the sand transport physics in the breaking and swash zones, through controlled experiments in a large-scale wave flume. The experiments involved high-resolution measurements of fluid and sand transport dynamics under energetic breaking waves over a medium-sand bed, using novel acoustic and conductivity-based measurement instruments. Hydrodynamic measurements in the breaking region show that wave breaking-generated turbulence invades the wave bottom boundary layer. This enhances suspended sediment pick-up rates (by an order of magnitude) in the breaking region relative to the wave shoaling region. Sand transport is composed by generally onshore-directed bedload and offshore-directed suspended transport. Suspended transport is dominated by current-related advection at outer-flow elevations; the wave-related transport is generally confined to the wave bottom boundary layer. The cross-shore distribution of the transport components is related to the breaker bar morphologic evolution and to cross-shore grain size sorting. Measurements of sheet flow processes in the swash zone using a novel conductivity-based measurement instrument reveal substantial intra-swash bed level changes (of up to 1 cm) due to the strong cross-shore non-uniformity of the flow and sediment transport. In addition, bore turbulence and cross-shore sediment advection lead to an increase in the swash zone sheet flow layer thickness.
10 citations
TL;DR: In this paper, the coupling effect between residual pore pressure and seabed stress has been considered to accelerate the pore water pressure accumulation, which implies that the existing decoupled model may underestimate the liquefaction potential of seabeds, particularly under standing wave loadings.
10 citations