Effect of inlet configuration on wave resonance in the narrow gap of two fixed bodies in close proximity

Moradi, Nima; Zhou, Tongming; Cheng, Liang

doi:10.1016/j.oceaneng.2015.04.063

Cited by 73 publications

(45 citation statements)

References 15 publications

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“…Reported results (e.g. Lu et al [14], [15], [16], [12]; Sauder et al [17], Moradi et al [18]) have shown satisfactory agreement with those obtained from experiments, indicating that the viscous fluid model performs well in predicting the violent free surface oscillation at the fluid resonance. The effects of different parameters, such as body draft, gap width and body breadth on resonant characteristics in side-by-side offloading operations were also studied by Saitoh e al.…”

Section: Introductionmentioning

confidence: 73%

“…The bodies have a bottom clearance of h-d. The incoming wave height H 0 is fixed at 0.024 m and the wave length L varies between 1 m and 6.28 m. These values are similar to those used in Saitoh et al [19], Lu et al [15] and Moradi et al [18].…”

Section: Numerical Model Setup and Boundary Conditionsmentioning

confidence: 96%

“…The outcome will be a rectangular simulation domain with higher mesh density around the bodies (as shown in Figure 2). In case of deep and ultra-deep water simulations the mesh density inside the domain is kept constant by multiplying the number of cells in the vertical direction by the depth ratio which is defined as the new depth over initial depth of 0.5 m. It should be noted that extensive checks for the dependency of the simulation results on mesh density have already been conducted for water depth h = 0.5 m in [18] and the corresponding higher water depths in this paper are modelled based on their work.…”

Section: Numerical Model Setup and Boundary Conditionsmentioning

confidence: 99%

“…Moradi et al [18] showed that a curved corner setup at the gap entrance resulted in an increase in the resonance wave height and a decrease in the resonant frequency for different corner roundness ratios. The present study will examine the effect of water depth on gap resonance characteristics for bodies with sharp corner inlet and compare the results with those reported previously using both experimental and numerical methods.…”

Section: Introductionmentioning

confidence: 99%

“…The present study will examine the effect of water depth on gap resonance characteristics for bodies with sharp corner inlet and compare the results with those reported previously using both experimental and numerical methods. The detailed effect of the corner shapes and gap inlet configurations on the flow near the corners and inside the small gap, as well as the gap resonance characteristics can be found in [18].…”

Section: Introductionmentioning

confidence: 99%

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Two-dimensional numerical study on the effect of water depth on resonance behaviour of the fluid trapped between two side-by-side bodies

Moradi

Zhou

Cheng

2016

Applied Ocean Research

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The effect of water depth on gap resonance of two side-by-side rectangular boxes is examined in a 2D numerical wave flume at various gap widths and body drafts. The numerical model used is based on the volume of fluid (VOF) method for the solution of Navier-Stokes equations combined with free surfaces. The water depth covered ranges from shallow to deep water regimes. It is found that the resonant frequencies and wave heights show apparent dependence on water depth. For a given body draft and gap width, the resonant wave frequency shifts to higher values whereas the resonant wave height inside the gap decreases as water depth increases. The amount of reduction of wave height is found to be dependent on the depth to draft and gap width to breadth ratio. It is observed that the effect of water depth on resonance frequency is very small when the ratio of water depth to body draft is equal to or greater than six, while the effect of water depth on resonant water level diminishes when this ratio increases beyond 10. Furthermore, it is observed that the variation trends of the resonant frequency and the reduction of the resonant wave height with water depth are similar at different drafts and gap widths. The present results suggest that the water depth, body draft and the ratio of water depth to body draft are the key factors that influence the resonant responses. It is also found that the potential flow model not only over-predicts the resonant wave heights but also fails to predict the variation trends of the resonant wave height with water depth.

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