Study on Influences of Fringing Reef on Harbor Oscillations Triggered by N-Waves

Gao, Jun liang; Chen, Hong zhou; Zhou, Xiao Yan; Dong, G. H.; Zang, Jun; Liu, Qian

doi:10.1007/s13344-021-0036-x

Cited by 5 publications

(2 citation statements)

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“…On the other hand, the flow model (FM) relies on shallow water equations (Saint-Venant equations) to simulate water flow dynamics, considering factors such as water depth, flow velocity, and external forces like gravity and friction. As evident from the annual bed level change diagrams (Figure 17), there is a noticeable sediment deposition at the port entrance, which can have severe implications for commuting and the possibility of the port being closed due to accumulated sediments [32,33]. As the first step to preventing the port's closure and reducing sedimentation, wave energy converters were proposed and modeled in simulations.…”

Section: The Impact Of Harbour Layout On Near Port Current Speed and ...mentioning

confidence: 99%

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Moradi,

Ilinca

2024

Energies

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In the face of depleting fossil energy and the imperative of sustainable development, there is a compelling drive towards advancing renewable energies. In this context, sustainable and predictable alternatives, like marine energy, gain prominence. Marine energy presents a cleaner option devoid of the adverse effects associated with fossil fuels, playing a crucial role in environmental sustainability by safeguarding coastlines against erosion. This study focuses on Astara Port in the Caspian Sea, exploring the utilization of wave energy converters (WECs). The originality of this study’s research lies in exploring WECs’ dual role in energy generation and coastal protection. Using MIKE21 software simulations, the impact of number, location, arrangement, and orientation of WECs across various scenarios was investigated, including two WEC number scenarios (11 and 13), three structural placement scenarios (north, front, and south of the port), two structural arrangement scenarios (linear and staggered), two port layout scenarios (original layout and modified layout), and two orientation scenarios for the structures (facing north-east, which is the dominant wave direction, and facing southeast). The results show a remarkable decrease in the significant wave height behind WECs, notably with 13 staggered devices facing dominant waves (from northeast), reducing the significant wave height Hs by 23–25%. This setup also shows the highest wave height reduction, notably 36.26% during a storm event. However, linear WEC setup offers more extensive coastline protection, covering 47.88% of the model boundary during storms. Furthermore, the 11 staggered WECs facing southeast (SE) arrangement had the lowest sediment accumulation at 0.0358 m over one year, showing effective sedimentation mitigation potential. Conversely, the 13 linear WECs facing northeast (NE) had the highest accumulation at 0.1231 m. Finally, the proposed port design redirects high-velocity flow away from the port entrance and removes rotatory flow, reducing sediment accumulation near the harbor entrance.

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Section: The Impact Of Harbour Layout On Near Port Current Speed and ...mentioning

confidence: 99%

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Moradi,

Ilinca

2024

Energies

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“…In the case of wave propagation near the coastal zone, Gao [31] numerically investigated transient harbor oscillations induced by various incident Nwaves. Four years later, Gao [32] studied the influences of a fringing reef on harbor oscillations triggered by N-waves. They simulated both the propagation of N-waves over the reef and the subsequently induced harbor oscillations using a Boussinesq-type numerical model, FUNWAVE-TVD.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Numerical Overview of the Performance of Godunov Solutions Using Roe and Rusanov Schemes Applied to Dam-Break Flow

Elong,

Zhou,

Karney

et al. 2024

Water

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As open channel simulations are of great economic and human significance, many numerical approaches have been developed, with the Godunov schemes showing particular promise. To evaluate, confirm, and extend the simulation results of others, a variety of first- and second-order FVMs are available, with Rusanov and Roe schemes being used here to simulate the demanding case of 1D and 2D flows following a dam break. The virtual boundary cells approach is shown to achieve a monotonic solution for both interior and boundary cells, and while flux computation is employed at boundary cells, a refinement is only rarely used in existing models. A number of variations are explored, including the TVD MUSCL-Hancock (monotone upwind scheme for conservation laws) numerical scheme with several slope limiters in a quest to avoid spurious oscillations. The sensitivity of the results to both channel length and the ratio of downstream to initial upstream water depth is explored using 1D and 2D models. The Roe scheme with a Van Leer limiter as a slope limiter is shown to be both fast and slightly more accurate than other slope limiters for this problem, but the Rusanov scheme with different slope limiters works well for 1D simulations. Significantly, the selection of an appropriate slope limiter is shown to be best based on the ratio of the downstream to upstream water depth. However, this study focuses on the special case where the ratio of the initial depth downstream to upstream of the dam is equal to or less than 0.5, and these outcomes are compared to theoretical results. The 2D dam-break problem is used to further explore first- and second-order methods using different slope limiters, and the results show that the Superbee limiter can be problematic due to an observed large dispersion in depth contours. However, the most promising approaches from previous studies are confirmed to deserve the high regard given to them by many researchers.

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Numerical Investigations on Harbor Oscillations Induced by Falling Objects

Gao

Zhang

et al. 2023

China Ocean Eng

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Study on Influences of Fringing Reef on Harbor Oscillations Triggered by N-Waves

Cited by 5 publications

References 50 publications

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

Impact of Wave Energy Converters and Port Layout on Coastal Dynamics: Case Study of Astara Port

A Comprehensive Numerical Overview of the Performance of Godunov Solutions Using Roe and Rusanov Schemes Applied to Dam-Break Flow

Numerical Investigations on Harbor Oscillations Induced by Falling Objects

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