Waves Plus Currents Crossing at a Right Angle: Sandpit Case

Faraci, Carla; Foti, Enrico; Marini, Alberto; Scandura, Pietro

doi:10.1061/(asce)ww.1943-5460.0000140

Cited by 11 publications

(11 citation statements)

References 29 publications

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“…The hydrodynamics of environments where waves and currents interact have been previously studied by various authors both co-directionally [1][2][3] and perpendicularly [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of the Hydrodynamics of Waves and Currents and Their Effects in Pier Scouring

Quezada

Tamburrino

Niño

2019

Water

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The scour around cylindrical piles due to codirectional and opposite waves and currents is studied with Reynolds Averaged Navier–Stokes (RANS) equations via REEF3D numeric modeling. First, a calibration process was made through a comparison with the experimental data available in the literature. Subsequently, not only the hydrodynamics, but also the expected scour for a set of scenarios, which were defined by the relative velocity of the current ( U C W ), were studied numerically. The results obtained show that the hydrodynamics around the pile for codirectional or opposite waves and currents not have significant differences when analyzed in terms of their velocities, vorticities and mean shear stresses, since the currents proved to be more relevant compared to the net flow. The equilibrium scour, estimated by the extrapolation of the numerical data with the equation by Sheppard, enabled us to estimate values close to those described in the literature. From this extrapolation, it was verified that the dimensionless scour would be less when the waves and currents are from opposite directions. The U C W parameter is an indicator used to adequately measure the interactions between the currents and waves under conditions of codirectional flow. Nevertheless, it is recommended to modify this parameter for currents and waves in opposite directions, and an equation is proposed for this case.

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“…The hydrodynamics of environments where waves and currents interact have been previously studied by various authors both co-directionally [1][2][3] and perpendicularly [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…In the case of waves orthogonal to currents, the experimental research developed by Feraci et al [4], Lim and Madsen [5] and Feraci et al [6] allows us to understand the effects of joint action on the…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Hydrodynamics of Waves and Currents and Their Effects in Pier Scouring

Quezada

Tamburrino

Niño

2019

Water

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“…Opposite the wavemaker a porous plane beach limits the reflection to about 10% of the incident wave. For a detailed description please refer to Faraci et al (2008) or Faraci, Foti, Marini, and Scandura (2012).…”

Section: Experimental Set Up and Proceduresmentioning

confidence: 99%

Waves plus currents crossing at a right angle: near-bed velocity statistics

Faraci

Scandura

Musumeci

et al. 2018

Journal of Hydraulic Research

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Wave-current flow over a bottom covered with different roughness elements was analysed to provide new insights into the statistical properties of the near-bed velocity. Experimental data were used from three different experimental campaigns, with orthogonal waves and currents over a sandy bed, a gravel bed and a rippled bed. Velocity profiles were acquired by means of a micro-ADV. The paper focuses on the effects that the waves have on the velocity statistics of the steady current. In particular, the near-bed velocities in the current direction closely follow a Gaussian distribution. When waves are added, the distribution becomes double-peaked. In order to get single-peaked velocity distributions the total velocity events in the current direction were decoupled by taking into account the sign of the wave directed velocities. The nature of the distribution functions is influenced by the mass conservation principle and, in the rippled bed case by the vorticity dynamics.

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“…In the presence of sandy beds, the interaction of asymmetrical and/or skewed waves with the bottom can lead to the appearance of bedforms that may exhibit a degree of asymmetry and this in turn may affect the flow [8].…”

Section: Introductionmentioning

confidence: 99%

Wave-Induced Oscillatory Flow Over a Sloping Rippled Bed

Faraci

Scandura

Petrotta

et al. 2019

Water

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In this paper, the findings of an experimental analysis aimed at investigating the flow generated by waves propagating over a fixed rippled bed within a wave flume are reported. The bottom of the wave flume was constituted by horizontal part followed by a 1:10 sloping beach. Bedforms were generated in a previous campaign performed with loose sand, and then hardened by means of thin layers of concrete. The flow was acquired through a Vectrino Profiler along two different ripples, one located in the horizontal part of the bed and the second over the sloping beach. It was observed that, on the horizontal bed, near the bottom, ripple lee side triggered the appearance of an onshore directed steady streaming, whereas ripple stoss side gave rise to an offshore directed steady streaming. On the sloping bed, a strong return current appears at all positions, interacting with the rippled bottom. The turbulence is non-negligible within the investigated water depth, particularly when velocities were onshore directed, due to flow asymmetry. Turbulence caused a considerable flow stirring which, above a non-cohesive bed, could lift the sediment up in the water column and give rise to a strong sediment transport.

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Waves Plus Currents Crossing at a Right Angle: Sandpit Case

Cited by 11 publications

References 29 publications

Numerical Study of the Hydrodynamics of Waves and Currents and Their Effects in Pier Scouring

Numerical Study of the Hydrodynamics of Waves and Currents and Their Effects in Pier Scouring

Waves plus currents crossing at a right angle: near-bed velocity statistics

Wave-Induced Oscillatory Flow Over a Sloping Rippled Bed

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