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Recent Advances in Offshore Hydrodynamics

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Oceans and Coastal Zones".

Deadline for manuscript submissions: 20 September 2026 | Viewed by 5101

Special Issue Editors


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Guest Editor
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
Interests: floating wind turbines; wave energy converters; floating photovoltaic; nonlinear liquid sloshing; ice–wave interaction; dynamics of floating structures; ocean renewable energy utilization equipment and control; computational fluid hydrodynamics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
College of Shipbuilding Engineering, Harbin Engineering University, Harbin, China
Interests: interaction between waves and structures; hydrodynamics of marine energy devices; extreme waves and wave attenuation methods; multi-functional coastal & offshore structures; hydrodynamic analysis theories and methods
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the field of offshore hydrodynamics, the interaction between hydrodynamic environment and structures is a critical area of study, influencing the design, construction, and operation of coastal and offshore structures. Understanding these interactions is crucial for predicting how structures respond to complex hydrodynamic forces, such as waves and currents. It also helps assess the impact on surrounding flow fields and ecosystems. Recent advancements in numerical simulations, experimental techniques, and analytical methods have enabled researchers to tackle increasingly intricate scenarios involving sophisticated structural designs and extreme hydrodynamic conditions.

The aim of this Special Issue is to provide a platform for scholars and engineers to present cutting-edge research on offshore hydrodynamics. This Special Issue aims to advance the frontiers of knowledge in ocean engineering and foster innovative solutions to address global challenges in hydrodynamic environments. Both original research and review articles are encouraged. Topics of interest to this collection include, but are not limited to, the following:

  1. Interactions between waves/currents and structures;
  2. Hydrodynamic optimization of floating structures;
  3. Computational fluid hydrodynamics;
  4. Ocean renewable energy;
  5. Dynamics of floating wind turbines.

Dr. Chongwei Zhang
Dr. Xuanlie Zhao
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • waves–structure interaction
  • offshore engineering
  • hydrodynamic analysis
  • ocean renewable energy
  • fixed and floating offshore wind turbines

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Published Papers (4 papers)

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Research

24 pages, 969 KB  
Article
A Revisit of Parametrizing Energy Dissipation Caused by Vortex Shedding at Thin-Plate Edges in Potential-Flow Models
by Clint C. M. Reyes and Zhenhua Huang
Water 2026, 18(5), 608; https://doi.org/10.3390/w18050608 - 3 Mar 2026
Viewed by 393
Abstract
Vortex-induced energy dissipation is critical, yet its influence is frequently neglected in potential-flow analysis of wave interaction with thin-walled structures. This study revisits the parametrization of vortex-induced energy dissipation in potential-flow analysis, particularly for wave interaction with vertical, surface-piercing plates. The parametrization is [...] Read more.
Vortex-induced energy dissipation is critical, yet its influence is frequently neglected in potential-flow analysis of wave interaction with thin-walled structures. This study revisits the parametrization of vortex-induced energy dissipation in potential-flow analysis, particularly for wave interaction with vertical, surface-piercing plates. The parametrization is derived by conceptually appending a short perforated region to the vortex-shedding edge of the plate. The underlying physical principle relies on the similarity between vortex shedding from a sharp edge and from an orifice. Two parameters are identified as important: the length of the perforated region and the quadratic loss coefficient associated with the pressure change. For practical applications, the value of the quadratic loss coefficient that is invariant of wave conditions is recommended for a given optimal length of the perforated region. The parametrization is validated using published results for a single plate, and its robustness is further demonstrated through applications involving two surface-piercing vertical plates with varying spacings. The findings of this study can find applications in using potential-flow theory to model plate-type wave breakwaters and wave interaction with thin-walled oscillating water column devices. Full article
(This article belongs to the Special Issue Recent Advances in Offshore Hydrodynamics)
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27 pages, 4995 KB  
Article
Numerical Investigation of the Hydrodynamic Performance of a V-Type Wave Dissipation System and Amphibious Landing Equipment Under Different Combined Fields
by Junming Hu, Chengshuai Song, Jiaxian Deng, Xueying Yu and Daiyu Zhang
Water 2026, 18(3), 309; https://doi.org/10.3390/w18030309 - 25 Jan 2026
Viewed by 383
Abstract
This study analyzes the hydrodynamic performance of a V-type wave dissipation system and amphibious landing equipment under different combined fields using the Reynolds-averaged Navier–Stokes (RANS) method. A three-dimensional numerical wave tank is established to simulate regular waves and validate the performance of an [...] Read more.
This study analyzes the hydrodynamic performance of a V-type wave dissipation system and amphibious landing equipment under different combined fields using the Reynolds-averaged Navier–Stokes (RANS) method. A three-dimensional numerical wave tank is established to simulate regular waves and validate the performance of an airbag-type floating breakwater. This study evaluates the optimal hydrodynamic performance of a V-type wave dissipation system under various configurations in a wave-only field and subsequently compares the efficacy of the better-performing system across multiple environmental conditions. The results show that the V-type wave dissipation system in the configurations of 30° and 45° angles is more favorable for the flow field and the amphibious landing equipment behind it. Compared to the wave-only condition, the time histories of wave heights under both wave-current and wind-wave conditions present an obvious phase advancement. In the wave-current field, a following current reduces the wave height and shortens the wave period. Conversely, in the wind-wave field, a following wind velocity leads to a certain increase in wave height while exerting minimal impact on the wave period. Compared to the wave-only condition, the peak and trough values of the wave height monitoring points in the combined wind-wave-current field show an increasing trend, with a significant increase in resistance and a shorter resistance period for the amphibious landing equipment behind the V-type wave dissipation system. This study shows that the selected V-type wave dissipation system proves to be more effective in wave-only and wave-current conditions, providing valuable references for the engineering application of this system. Full article
(This article belongs to the Special Issue Recent Advances in Offshore Hydrodynamics)
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41 pages, 14371 KB  
Article
An Improved Variable-Speed Control Strategy for Air Turbine of Floating Oscillating Water Column Wave Energy Converter
by Yuxuan Liu, Cheng Zhang, Jiahao Wang and Chongwei Zhang
Water 2025, 17(23), 3377; https://doi.org/10.3390/w17233377 - 26 Nov 2025
Cited by 2 | Viewed by 683
Abstract
This study proposes an improved variable-speed control strategy for Wells turbines in floating oscillating water column (OWC) wave energy converters (WECs) to address efficiency loss caused by turbine stalling. By optimizing the ϕ from the conventional critical value from 0.3 to 0.11, the [...] Read more.
This study proposes an improved variable-speed control strategy for Wells turbines in floating oscillating water column (OWC) wave energy converters (WECs) to address efficiency loss caused by turbine stalling. By optimizing the ϕ from the conventional critical value from 0.3 to 0.11, the system achieves maximum mechanical power output while avoiding stall effects. A dynamic rotor-speed controller is designed to modulate turbine rotation behavior in response to real-time airflow velocity. This approach is validated using numerical simulations and MATLAB/Simulink R2021b models under both regular and irregular wave conditions. Results show a 124% increase in turbine power compared to uncontrolled operation, with stable DC-link voltage (+0.2%) and reduce torque ripple. The strategy enhances energy conversion efficiency by 51.2% and ensures safe operation under mechanical speed limits (3000 rpm), thus offering a practical solution for offshore WEC systems. Full article
(This article belongs to the Special Issue Recent Advances in Offshore Hydrodynamics)
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17 pages, 2773 KB  
Article
Experimental Study on Nonlinear Vibrations of Flexible Monopile-Foundation Offshore Wind Turbines in Regular Waves
by Songxiong Wu, Hao Zhang, Ziwen Chen, Xiaoting Liu, Long Zheng, Mengjiao Du, Rongfu Li and Donghai Li
Water 2025, 17(8), 1176; https://doi.org/10.3390/w17081176 - 15 Apr 2025
Cited by 6 | Viewed by 2983
Abstract
The offshore wind industry is increasingly moving towards larger turbines. The growth in rotor size and aerodynamic loads necessitates larger monopile foundations. This increased foundation height results in a monopile that exhibits pronounced slenderness and flexibility. Consequently, the fixed-bottom monopile becomes more susceptible [...] Read more.
The offshore wind industry is increasingly moving towards larger turbines. The growth in rotor size and aerodynamic loads necessitates larger monopile foundations. This increased foundation height results in a monopile that exhibits pronounced slenderness and flexibility. Consequently, the fixed-bottom monopile becomes more susceptible to wave loads, which can induce nonlinear vibrations in complex wave environments. Extensive physical model experiments have been conducted in a wave tank to study the nonlinear vibration characteristics of a fixed-bottom monopile under regular wave action. The experimental results demonstrate that when the wave period is close to twice the resonant period of the model, the vibration response of the monopile increases significantly. Under these conditions, a second harmonic resonance occurs, with the amplitude of the second harmonic component being more than twice that of the fundamental (wave frequency) component. Additionally, the maximum run-up around the model exhibits a W-shaped distribution in the circumferential direction, with the highest run-up observed on the incident wave side. The wave pressure at the water surface is the greatest and increases with wave height, while the pressure below the water surface gradually increases with the measurement height. Full article
(This article belongs to the Special Issue Recent Advances in Offshore Hydrodynamics)
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