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A special issue of Journal of Marine Science and Engineering (ISSN 2077-1312). This special issue belongs to the section "Ocean Engineering".

Deadline for manuscript submissions: closed (1 March 2022) | Viewed by 17354

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Special Issue Editors

Dr. Yigit Kemal Demirel

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Guest Editor

Department of Naval Architecture, Ocean & Marine Engineering, University of Strathclyde, Glasgow, UK
Interests: marine hydrodynamics; computational fluid dynamics; ship resistance and propulsion; fouling/coating hydrodynamics; seakeeping; fouling-control coatings; numerical modeling
Special Issues, Collections and Topics in MDPI journals

Dr. Soonseok Song

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Guest Editor

Department of Naval Architecture & Ocean Engineering, College of Engineering, Inha University, Incheon 22212, Republic of Korea
Interests: ship resistance; experimental fluid dynamics (EFD); computational fluid dynamics (CFD)
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue focuses on the Marine Applications of Computational Fluid Dynamics with a specific emphasis on the applications of naval architecture, ocean, and marine engineering. CFD is an emerging area and is gaining popularity due to the availability of ever-increasing computational power. If used accurately, CFD methods may overcome the limitations of experimental and other numerical methods, in some respects.

We invite researchers from both academia and industry to submit original articles that advance state-of-the-art marine applications of computational fluid dynamics or review the progress and future directions of research in this field. The scope of this Special Issue covers the range of subjects relevant to naval architecture, ocean, and marine engineering. The applications will include ships, oil and gas platforms, and marine and offshore renewable energy structures.

Dr. Yigit Kemal Demirel
Dr. Soonseok Song
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. Journal of Marine Science and Engineering is an international peer-reviewed open access monthly 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

ship resistance and propulsion
seakeeping and maneuverability
vortex-induced motions (VIMs) and vortex-induced vibrations (VIVs)
validation and verification of computational fluid dynamics (CFD)
fluid/structure interaction
EFD/CFD combined methods
drag reduction technologies
fouling/coating hydrodynamics

Published Papers (7 papers)

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Research

21 pages, 10491 KiB

Open AccessFeature PaperArticle

CFD Prediction of Wind Loads on FPSO and Shuttle Tankers during Side-by-Side Offloading

by Jung-Hee Yoo, Patrick Schrijvers, Arjen Koop and Jong-Chun Park

J. Mar. Sci. Eng. 2022, 10(5), 654; https://doi.org/10.3390/jmse10050654 - 12 May 2022

Cited by 1 | Viewed by 2052

Abstract

This study entailed the estimation of wind loads performed using computational fluid dynamics (CFD) simulations for four typical offshore vessels and for a Floating Production, Storage, and Offloading (FPSO) and shuttle tanker in a side-by-side configuration on offloading. For all vessels, under the wind heading condition, four meshes were used to carry out the verification and validation (V&V) study to check the numerical uncertainty. The CFD simulation results for the aerodynamic coefficients were compared with wind tunnel tests from the Offloading Operability 2 JIP. All CFD simulation results show generally good agreement with the experimental data, and the overall trend of the coefficients are well captured. In addition, the effect on the gap sizes between the FPSO and shuttle tanker in the range of 4–30 m was examined. On this basis, the shielding effect was analyzed according to the size of the gap between the two ships. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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16 pages, 4422 KiB

Open AccessArticle

Numerical Simulation of Cavitation Flow in a Low Specific-Speed Centrifugal Pump with Different Diameters of Balance Holes

by Weidong Cao, Xinyu Yang and Zhixiang Jia

J. Mar. Sci. Eng. 2022, 10(5), 619; https://doi.org/10.3390/jmse10050619 - 02 May 2022

Viewed by 1717

Abstract

In order to study the influence of a balance hole’s diameter on the cavitation performance of low specific-speed centrifugal pumps, a centrifugal pump with a specific speed of 0.301 was selected as the research object. The pump’s cavitation performance, distribution of cavitation vapor in the impeller, and axial force on the impeller were studied with the change in diameters of balance holes. The results show that with the increase in the diameter of balance holes, the cavitation number σ_3% of the low specific-speed centrifugal pump became small, the pressure in the mechanical seal cavity dropped gradually, and the flow velocity in balance holes was reduced. As cavitation occurred in the impeller, the diameter of balance holes not only affected the absolute value of the axial force but also affected the direction of the axial force. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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18 pages, 10834 KiB

Open AccessArticle

Flow Characteristics of Oblique Submerged Impinging Jet at Various Impinging Heights

by Di Zhang, Hongliang Wang, Jinhua Liu, Chuan Wang, Jie Ge, Yong Zhu, Xinxin Chen and Bo Hu

J. Mar. Sci. Eng. 2022, 10(3), 399; https://doi.org/10.3390/jmse10030399 - 10 Mar 2022

Cited by 18 | Viewed by 2357

Abstract

To study the influence of impinging height H/D on the flow field characteristics of oblique submerged impinging jets, the numerical calculation of an oblique submerged impinging jet was carried out based on Wray–Agarwal (W–A) turbulence model. The jet flow field structure and pressure distribution under various impinging heights (1 ≤ H/D ≤ 8) when the impinging angle was θ = 45° were analyzed. The results show that with the increase in the impinging height, the diffusion degree of the jet gradually increased and the velocity decreased when the jet reached the impingement region, and the distance between the stagnation point (SP) and the geometric center (GC) gradually increased, the flow angle φ along the jet centerline remained constant in the free-jet region and rapidly decreased in the impingement region. The impingement plate pressure distribution at various heights was similar, and the impinging pressure concentration on the upstream side of the maximum pressure point was higher. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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18 pages, 11225 KiB

Open AccessArticle

Study of the Cone-Shaped Drogue for a Deep-Towed Multi-Channel Seismic Survey System Based on Data-Driven Simulations

by Xiangqian Zhu, Mingqi Sun, Tianhao He, Kaiben Yu, Le Zong and Jin-Hwan Choi

J. Mar. Sci. Eng. 2021, 9(12), 1367; https://doi.org/10.3390/jmse9121367 - 02 Dec 2021

Cited by 5 | Viewed by 2087

Abstract

A drogue is used to stabilise and straighten seismic arrays so that seismic waves can be well-received. To embed the effect of a cone-shaped drogue into the numerical modelling of the deep-towed seismic survey system, one surrogate model that maps the relationship between the hydrodynamic characteristics of the drogue and towing conditions was obtained based on data-driven simulations. The sample data were obtained by co-simulation of the commercial software RecurDyn and Particleworks, and the modelling parameters were verified by physical experiments. According to the Morison formula, the rotational angle, angular velocity, angular acceleration, towing speed, and towing acceleration of the drogue were selected as the design variables and drag forces and aligning torque were selected as the research objectives. The sample data of more than 8500 sets were obtained from virtual manoeuvres. Subsequently, both polynomial and neural network regression algorithms were used to study these data. Finally, analysis results show that the surrogate model obtained by machine learning has good performance in predicting research objectives. The results also reveal that the neural network regression algorithm is superior to the polynomial regression algorithm, its largest error of mean square is less than 0.8 (N²/N² mm²), and its R-squared is close to 1. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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23 pages, 6147 KiB

Open AccessArticle

Numerical Investigation of the Characteristics of Erosion in a Centrifugal Pump for Transporting Dilute Particle-Laden Flows

by Rui-Jie Zhao, You-Long Zhao, De-Sheng Zhang, Yan Li and Lin-Lin Geng

J. Mar. Sci. Eng. 2021, 9(9), 961; https://doi.org/10.3390/jmse9090961 - 03 Sep 2021

Cited by 14 | Viewed by 2182

Abstract

Erosion in centrifugal pumps for transporting flows with dilute particles is a main pump failure problem in many engineering processes. A numerical model combining the computational fluid dynamics (CFD) and Discrete Element Method (DEM) is applied to simulate erosion in a centrifugal pump. Different models of the liquid-solid inter-phase forces are implemented, and the particle-turbulence interaction is also defined. The inertial particles considered in this work are monodisperse and have finite size. The numerical results are validated by comparing the results with a series of experimental data. Then, the effects of particle volume fraction, size, and shape on the pump erosion are estimated in the simulations. The results demonstrate that severe erosive areas are located near the inlet and outlet of the pressure side of the impeller blade, the middle region of the blade, the corners of the shroud and hub of the impeller adjoining to the pressure side of the blade, and the volute near the pump tongue. Among these locations, the maximum erosion occurs near the inlet of the pressure side of the blade. Erosion mitigation occurs under the situation where more particles accumulate in the near-wall region of the eroded surface, forming a buffering layer. The relationship between the particle size and the erosion is nonlinear, and the 1 mm particle causes the maximum pump erosion. The sharp particles cause more severe erosion in the pump because both the frequency of particle-wall collisions and the impact angle increase with the increasing sharpness of the particle. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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19 pages, 5926 KiB

Open AccessArticle

Numerical Simulation of Depth Tracking Control of an Underwater Towed System Coupled with Wave–Ship Interference

by Xianyuan Yang, Jiaming Wu, Quanlin Li and Haiyan Lv

J. Mar. Sci. Eng. 2021, 9(8), 874; https://doi.org/10.3390/jmse9080874 - 13 Aug 2021

Cited by 4 | Viewed by 2060

Abstract

This paper presents a numerical study of the depth tracking control for an underwater towed system under wave–ship interference condition. To overcome the laminations of ignoring the hydrodynamic factors and wave–ship interference in the existing simulation model for the depth tracking operation of the underwater towed system, a numerical model combining the control system with the computational fluid dynamics (CFD) method based on the overset mesh technique is explored and constructed; the influence of towing ship and head waves is introduced into the numerical analysis of the underwater towed system; a depth control system based on the center of gravity adjustment is proposed and its control characteristics are discussed. The fluid motion around the towed vehicle and the towing ship is governed by the Navier–Stokes equations, and the overset mesh technique is applied for the numerical solution of the equations. The towing cable connecting the towed vehicle and towing ship is governed by the quasi-steady-state catenary equations. The depth tracking controller adjusting the longitudinal position of a shifting weight is constructed based on the proportional–integral–derivative (PID) algorithm. The simulation results show that the numerical simulation system is practicable, and the depth tracking control system is feasible, effective, and robust. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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15 pages, 36684 KiB

Open AccessArticle

1D–3D Coupling for Gas Flow Analysis of the Air-Intake System in a Compression Ignition Engine

by Kyong-Hyon Kim and Kyeong-Ju Kong

J. Mar. Sci. Eng. 2021, 9(5), 553; https://doi.org/10.3390/jmse9050553 - 20 May 2021

Cited by 6 | Viewed by 2861

Abstract

Devices for reducing environmental pollutant emissions are being installed in ship compression ignition (CI) engines; alternatively, the designs of intake and exhaust pipes and ports are being modified to tune the performance according to the user’s needs. In both cases, substantial computation time and cost are required to simulate the gas flow of the CI engine with an air-intake system. In order to simulate the air-intake system of the CI engine, which changes according to the user’s needs, at a low cost and in a short time, we aimed to analyze the gas flow using a 1D–3D coupled method. The 1D zone was analyzed using the method of characteristics, and the 3D zone was analyzed using the commercial computational fluid dynamics (CFD) code Ansys Fluent R15.0, whereas their coupling was achieved by applying the developed 1D–3D coupling algorithm to Ansys Fluent R15.0 using user-defined functions (UDFs). In the comparison of the pressure of the intake pipe with the experimental result, the average error was 0.58%, thereby validating the approach. In addition, when analyzing the intake pipe and port in a 3D zone, the results of the velocity and pressure were expressed as contours, allowing them to be visualized. It is expected that the 1D–3D coupling algorithm of the air-intake system can be used to reflect the user’s needs and can be used as a method to quickly and accurately calculate the gas flow within tens of minutes. Full article

(This article belongs to the Special Issue Marine Applications of Computational Fluid Dynamics)

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