Kinematics of 2‐D Transient Water Waves Using Laser Doppler Anemometry

Kim, Cheung H.; Randall, Robert E.; Boo, Sung Youn; Krafft, M.J.

doi:10.1061/(asce)0733-950x(1992)118:2(147)

Cited by 18 publications

(17 citation statements)

References 9 publications

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“…[5,7,9]. We further discuss the large-scale observations of the FULWACK experiment in view of the present results, see Section 5.…”

Section: Focus Of the Present Workmentioning

confidence: 74%

“…Strong plungers were observed in the experimental works by Kim et al [5] (kh ¼ 2:0; kh m ¼ 0:33; where k denotes wavenumber, h the water depth and h m the maximal elevation of the event) and Skyner [9] (kh ¼ 2:6; kh m ¼ 0:36). In the experiments by Skyner the recorded fluid velocity was found to exceed the (nonlinear) wave speed, although the latter is not well defined for strongly nonlinear waves.…”

Section: Plunging Breakersmentioning

confidence: 92%

“…Buckley and Stavovy [1] and Forristall [2]. LDV (Laser Doppler Velocimetry) laboratory experiments are carried out, most notably by Skjelbreia et al [3,4], Kim et al [5], Longridge et al [6] and Baldock et al [7]. These works include descriptions of theoretical models.…”

Section: Previous Experimental Workmentioning

confidence: 99%

“…Kim et al [5] measured the kinematics due to focusing waves in a laboratory wave tank with moderately deep water using LDA (Laser Doppler Anemometry). Recordings were made at three levels between the mean water line and the crest.…”

Section: Previous Experimental Workmentioning

confidence: 99%

See 3 more Smart Citations

Kinematics of extreme waves in deep water

Grue

Clamond

Huseby

et al. 2003

Applied Ocean Research

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The velocity profiles under crest of a total of 62 different steep wave events in deep water are measured in laboratory using particle image velocimetry. The waves take place in the leading unsteady part of a wave train, focusing wave fields and random wave series. Complementary fully nonlinear theoretical/numerical wave computations are performed. The experimental velocities have been put on a nondimensional form in the following way: from the wave record (at a fixed point) the (local) trough-to-trough period, T TT and the maximal elevation above mean water level, h m of an individual steep wave event are identified. The local wavenumber, k and an estimate of the wave slope, e are evaluated from v 2 =ðgkÞ ¼ 1 þ e 2 ; kh m ¼ e þ 1 2 e 2 þ 1 2 e 3 ; where v ¼ 2p=T TT and g denotes the acceleration of gravity. A reference fluid velocity, e ffiffiffiffi g=k p is then defined. Deep water waves with a fluid velocity up to 75% of the estimated wave speed are measured. The corresponding kh m is 0.62. A strong collapse of the nondimensional experimental velocity profiles is found. This is also true with the fully nonlinear computations of transient waves. There is excellent agreement between the present measurements and previously published Laser Doppler Anemometry data. A surprising result, obtained by comparison, is that the nondimensional experimental velocities fit with the exponential profile, i.e. e ky ; y the vertical coordinate, with y ¼ 0 in the mean water level.

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“…[5,7,9]. We further discuss the large-scale observations of the FULWACK experiment in view of the present results, see Section 5.…”

Section: Focus Of the Present Workmentioning

confidence: 74%

Section: Plunging Breakersmentioning

confidence: 92%

Section: Previous Experimental Workmentioning

confidence: 99%

Section: Previous Experimental Workmentioning

confidence: 99%

See 2 more Smart Citations

Kinematics of extreme waves in deep water

Grue

Clamond

Huseby

et al. 2003

Applied Ocean Research

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“…Kim et al (1992) used Laser Doppler Anemometry (LDA) for measuring flow field of transient waves. Longridge et al (1996) also used results from LDA, and then calculated local and convective acceleration of flow particle.…”

Section: Introductionmentioning

confidence: 99%

A study of flow structure of bichromatic waves through PIV analysis

Jo¹,

Lee²,

Choi³

2012

International Journal of Ocean System Engineering

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An experimental study was carried out in order to understand the kinematics of bichromatic waves. Bichromatic waves are generated in a two-dimensional wave tank, and measured by panorama PIV technique, which allows the flow fields to be captured with respect to a spatial coordinate system. We compared wave profiles and velocities of wave particles obtained by experiment with theoretical results using Stokes 1st and 2nd order waves. The velocity distribution at wave crest and trough of the highest and lowest point of a bichromatic wave are investigated in this study.

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