Experimental Study of Wave Blocking

Suastika, I Ketut; Jong, M. P. C. de; Battjes, J.A.

doi:10.1061/40549(276)18

Cited by 12 publications

(22 citation statements)

References 10 publications

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“…In our experiments [Suastika et al, 2000], beside wave energy dissipation due to wave breaking, there are wave energy dissipation due to the interaction between the waves and the perforated false bottom and wave energy dissipation in the flume side-wall boundary layer. In this section, we only consider wave energy dissipation due to wave breaking (D r ) since it relates closely to the phenomenon of wave blocking, in the laboratory as well as in the field.…”

Section: Wave Energy Dissipation In the Far Fieldmentioning

confidence: 70%

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A Model for Blocking of Periodic Waves

Suastika

Battjes

2009

Coastal Engineering Journal

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In this paper, we present a model for the amplitude evolution of periodic waves blocked by a counter current. The model consists of a WKB-solution for slowly varying waves far from the blocking point which is matched with a uniformly-valid approximation for the rapidly varying waves near the blocking point. Wave energy dissipation is taken into account both in the regions far from and near to the blocking point. The predicted pattern of wave amplitude evolution agrees well with observations.

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Section: Wave Energy Dissipation In the Far Fieldmentioning

confidence: 70%

“…For the purpose of verifying the model results we shall compare these with the experimental results of Suastika et al [2000]. A description of the experimental arrangement is given below.…”

Section: Comparison Between Model Results and Experimentsmentioning

confidence: 99%

A Model for Blocking of Periodic Waves

Suastika

Battjes

2009

Coastal Engineering Journal

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“… Computational domain setup to simulate the novel experimental study on wave blocking (Suastika et al, ). Current is introduced into the flume through the right boundary.…”

Section: Methodsmentioning

confidence: 99%

“…The SST

k - ω

turbulence model by Mentor (1994) is extended by modifying the production term to avoid excessive turbulence production in the interior flow (Mayer & Madsen, ). A novel numerical wave‐current flume is developed to study the wave breaking and blocking solely due to current, by excluding the effect of varying water depth and flume width as in Suastika et al's () experiment.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Wave Breaking and Blocking by Spatially Varying Opposing Currents

Chen

Zou

2018

JGR Oceans

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A Reynolds‐Averaged Navier‐Stokes (RANS) flow solver with a Volume of Fluid (VOF) surface capturing scheme is used to investigate wave breaking and blocking due to strong opposing currents. The Shear Stress Transport (SST) k−ω model is modified in order to capture the turbulence properly. The unique capability of the RANS‐VOF model allows us to reveal the distinct features of current‐induced wave breaking and blocking. The limiting wave steepness at breaking onset is reduced considerably by the opposing current from the Stokes' limit for stationary waves. Although the wave height grows faster before breaking under a more rapidly varying current, the maximum height at the breaking onset remains almost the same. The locations of incipient breaking are slightly shifted downstream/upwave by the increased current gradient. It was found that the wave radiation stress alters the mean water level by competing with the pressure gradient arising from the current‐induced surface tilting. The wave set‐down and set‐up is more pronounced for more intensive breakers occurring under a larger incident wave and current gradient. Our model results indicate an undertow‐like change to the current profile due to wave breaking. The turbulence and vorticity generated by the current‐induced breaking wave persist and are advected downstream and interact with those generated by the following wave and current.

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“…Among them we can cite the wave blocking, wave breaking and wave trapping. Wave blocking occurs when a wave is propagating in the direction opposite of a strong enough current so its group velocity reduces to zero [12]. These blocked waves can also break in some conditions.…”

Section: Two-step Algorithmmentioning

confidence: 99%

Short wave spectrum modulation by a surface current field and long waves for SAR imaging process simulation

Lamy¹,

Caillec²,

Garello³

et al.

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings

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In the framework of the SAR imaging process simulator we are developing, the modification of the short wave spectrum by ocean surface is of great importance. Short waves at the sea surface produce the backscattering of the radar wave. So the modulation of the short wave distribution by ocean surface induces the modulation of the SAR image.In this paper we present a two-step algorithm designed to simulate the modulation of the short waves by both current and long waves. First of all the modulation of the long waves by current is taken into account. Then the modification of the short wave spectrum by long-wave orbital velocity and current is considered.To achieve the calculation we use the action balance equation (ABE) based on a weak interaction theory. ABE theory and the two-step algorithm are described here.

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Experimental Study of Wave Blocking

Cited by 12 publications

References 10 publications

A Model for Blocking of Periodic Waves

A Model for Blocking of Periodic Waves

Characteristics of Wave Breaking and Blocking by Spatially Varying Opposing Currents

Short wave spectrum modulation by a surface current field and long waves for SAR imaging process simulation

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