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Water
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Computational Methods for Ocean Wave Interaction with Marine Structures
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Computational Methods for Ocean Wave Interaction with Marine Structures

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

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 5815

Special Issue Editors

Prof. Dr. Trilochan Sahoo

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Guest Editor
Dept. of Ocean Engineering & Naval Architecture, Indian Institute of Technology Kharagpur, India 721302
Interests: ocean engineering; mathematical modeling; numerical methods; coastal hydrodynamics; hydroelasticity
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Swaroop Nandan Bora

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Guest Editor
Department of Mathematics, Indian Institute of Technology Guwahati, Guwahati, India
Interests: wave–structure interactions; scattering; trapping; sloshing; river mechanics
Dr. Santanu Koley

E-Mail Website
Guest Editor
Department of Mathematics, Birla Institute of Technology & Science – Pilani, Hyderabad Campus, Secunderabad, India
Interests: ocean engineering; boundary element method; computational fluid dynamics; wave energy converter devices; mathematical modeling

Special Issue Information

Dear Colleagues,

We are inviting you to contribute to this Special Issue of the journal Water.

In the context of global warming, it is imperative to handle extreme events such as storm surges and sea level rise for climate adaptation. To optimize the utilization of ocean space, it is also necessary to support the blue economy via the development of maritime infrastructure with multiple functions. Therefore, the co-design and co-construction of marine infrastructures have become essential for addressing the enormous risks presented by global warming. These structures are ideal for floating airports, storage facilities, and even entertainment centers because of their low cost of construction, fast movement, and small environmental impact. In this context, it is essential to understand the hydrodynamic performance of various marine structures under wave action. This Special Issue focuses on diverse numerical techniques for addressing hydrodynamics problems involving the interaction of ocean waves with structures, such as floating, stationary and moving bodies relevant to ocean engineering. We welcome studies on both frequency-domain and time-domain analyses. Emphasis will be on both linear and nonlinear wave–structure interaction problems. Encouraged is the study of both regular and irregular waves, including wave interaction with extreme waves generated by tsunamis and storm surges, as well as wave propagation in the surf zone. The relevant marine structures can be porous, poroelastic and flexible. Several effective numerical tools, such as numerical schemes based on computational fluid dynamics, boundary element method, CFD-based solution techniques, finite element method, and the coupling of boundary and finite-element methods, have been used to solve a wide variety of wave–structure interaction problems in recent years. This Special Issue will provide an excellent opportunity to discuss research on numerical techniques for the interaction of ocean waves with various engineering structures in the presence of ocean currents, seabed undulations, stratified water, and turbulent flows. This Special Issue focuses on numerical computations with theoretical and experimental validations. Both research and review papers are invited for potential publication in this Special Issue.

Prof. Dr. Trilochan Sahoo
Prof. Dr. Swaroop Nandan Bora
Dr. Santanu Koley
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

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

  • water waves
  • boundary element method
  • computational fluid dynamics
  • wave–structure interaction
  • physical model test

Published Papers (3 papers)

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Research

20 pages, 11470 KiB  
Article
3D CFD Study of Scour in Combined Wave–Current Flows around Rectangular Piles with Varying Aspect Ratios
by Debasish Dutta, Mohammad Saud Afzal and Said Alhaddad
Water 2023, 15(8), 1541; https://doi.org/10.3390/w15081541 - 14 Apr 2023
Cited by 10 | Viewed by 1893
Abstract
This study utilizes three-dimensional simulations to investigate scour in combined wave–current flows around rectangular piles with various aspect ratios. The simulation model solves the Reynolds-averaged Navier–Stokes (RANS) equations using the k–ω turbulence model, and couples the Exner equation to compute bed elevation [...] Read more.
This study utilizes three-dimensional simulations to investigate scour in combined wave–current flows around rectangular piles with various aspect ratios. The simulation model solves the Reynolds-averaged Navier–Stokes (RANS) equations using the k–ω turbulence model, and couples the Exner equation to compute bed elevation changes. The model also employs the level-set approach to realistically capture the free surface, and couples a hydrodynamic module with a morphological module to simulate the scour process. The morphological module employs a modified critical bed shear stress formula on a sloping bed and a sand-slide algorithm for erosion and deposition calculations in the sediment bed. To validate the numerical model, simulations are conducted in a truncated numerical wave tank with the Dirichlet boundary condition and active wave absorption method. After validation, the numerical model is used to investigate the effect of aspect ratio and the Keulegan–Carpenter (KC) number on scour depth in a combined wave–current environment. The study finds that the normalized scour depth is highest for a rectangular pile with an aspect ratio of 2:1 and lowest for an aspect ratio of 1:2. The maximum normalized scour depth (S/D) for aspect ratios of 2:1 are 0.151, 0.218, and 0.323 for KC numbers 3.9, 5.75, and 10, respectively, whereas the minimum normalized scour depth (S/D) for aspect ratios of 1:2 are 0.132, 0.172, and 0.279. Additionally, the research demonstrates that the normalized scour depth increases with an increase in the KC number for a fixed wave–current parameter (Ucw). Full article
(This article belongs to the Special Issue Computational Methods for Ocean Wave Interaction with Marine Structures)
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20 pages, 4848 KiB  
Article
A Methodological Tool to Assess Erosion Susceptibility of High Coastal Sectors: Case Studies from Campania Region (Southern Italy)
by Maria Francesca Tursi, Giorgio Anfuso, Fabio Matano, Gaia Mattei and Pietro P. C. Aucelli
Water 2023, 15(1), 121; https://doi.org/10.3390/w15010121 - 29 Dec 2022
Cited by 2 | Viewed by 1671
Abstract
High coastal sectors constitute the most widespread coastal environment and, under the present accelerated sea-level rise scenario, are suffering huge impacts in terms of erosion. The aim of this paper is the proposal of a new methodological approach for the assessment of their [...] Read more.
High coastal sectors constitute the most widespread coastal environment and, under the present accelerated sea-level rise scenario, are suffering huge impacts in terms of erosion. The aim of this paper is the proposal of a new methodological approach for the assessment of their susceptibility to erosive processes. The method is based on the combination of two matrices, i.e., a matrix considering the main physical elements (essentially morphological and geotechnical characteristics) that determine the proneness to erosion of a specific high coastal sector, and a forcing matrix, which describes the forcing agents affecting the considered sector. Firstly, several variables were selected to construct each one of the two matrices according to existing studies and, in a second step, they were interpolated to obtain the susceptibility matrix (CSIx). The approach was applied to Procida Island and Cilento promontory, both located in southern Italy. Results obtained were validated by comparing them with cliff retreat data obtained by means of aerial photographs and satellite images. The analysis shows that the greater part of the analyzed high coastal sectors belongs to the high-susceptibility class due to the combination of adverse morphological, geotechnical and forcing characteristics. Such sectors can be considered “hotspots” that require an increase in monitoring programs and, at places, urgent protective actions. Full article
(This article belongs to the Special Issue Computational Methods for Ocean Wave Interaction with Marine Structures)
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21 pages, 14972 KiB  
Article
Numerical Modelling of an Innovative Conical Pile Head Breakwater
by Arunakumar Hunasanahally Sathyanarayana, Praveen S. Suvarna, Pruthviraj Umesh, Kiran G. Shirlal, Hans Bihs and Arun Kamath
Water 2022, 14(24), 4087; https://doi.org/10.3390/w14244087 - 14 Dec 2022
Viewed by 1805
Abstract
When moderate wave activity at the shoreline is acceptable, pile breakwaters can serve as an alternative to conventional breakwaters. Increasing the size of the pile breakwater in the vicinity of the free surface increases the hydraulic efficiency, as most of the wave energy [...] Read more.
When moderate wave activity at the shoreline is acceptable, pile breakwaters can serve as an alternative to conventional breakwaters. Increasing the size of the pile breakwater in the vicinity of the free surface increases the hydraulic efficiency, as most of the wave energy is concentrated around the free surface. Therefore, a conical pile head breakwater (CPHB) is proposed in the present study by gradually widening the diameter of the piles towards the free surface. Using the open-source computational fluid dynamics (CFD) model REEF3D, the transmission, reflection, and dissipation characteristics of the CPHB with monochromatic and irregular waves are examined. The investigation is carried out for both perforated and non-perforated CPHBs using monochromatic waves, and the numerical results are validated using experimental data. Further, optimally configured non-perforated and perforated CPHBs are investigated numerically by subjecting them to irregular waves using the Scott–Wiegel spectrum. The wave attenuation characteristics of the CPHBs are found to be better with irregular waves compared to monochromatic waves. With irregular waves, the minimum transmission coefficients for non-perforated and perforated CPHBs are 0.36 and 0.34, respectively. Overall, the CPHB appears to be a potential solution for coastal protection. Full article
(This article belongs to the Special Issue Computational Methods for Ocean Wave Interaction with Marine Structures)
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