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Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition
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Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition

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

Deadline for manuscript submissions: 10 October 2024 | Viewed by 4291

Special Issue Editors

Dr. Bin Xu

E-Mail Website
Guest Editor
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, China
Interests: vortex induced vibrations; fluid-structure interactions; linear and non-linear wave mechanics; cavitation; multiphase flow; heat and mass transfer; computational fluid dynamics
Special Issues, Collections and Topics in MDPI journals
Dr. Yanmei Jiao

E-Mail Website
Guest Editor
School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, China
Interests: marine and offshore renewable energy; technology for energy efficiency and green shipping; novel energy conversion system for harvesting renewable salinity energy; artificial intelligence-enhanced air management and energy consumption research of green data center; research and development of air conditioning system for buildings and its energy consumption analysis
Special Issues, Collections and Topics in MDPI journals
Dr. Xi Shen

E-Mail Website
Guest Editor
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, China
Interests: complicated flow and cavitation in hydraulic machinery; multiphase transportation mechanism in pumps for the oil and gas exploitation; high-pressure pump used in seawater desalination and energy recovery; performance and cavitation of automobile (electronic) water pump and its cooling system
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Computational fluid dynamics (CFD) uses numerical analysis and data structures to analyze and solve problems involving fluid flows. CFD is gaining popularity in ocean engineering as a result of the availability of ever-increasing computational power. This Special Issue covers the entire range of issues and technologies related to floating offshore structures (floating and fixed offshore platforms, offshore infrastructures, etc.), with a strong emphasis on CFD simulation technology.

We seek contributions spanning a broad range of topics related (but not limited) to the following:

  • Hydrodynamics;
  • Computational fluid dynamics;
  • Vortex-induced vibrations;
  • Fluid–structure interactions;
  • Linear and nonlinear wave mechanics;
  • Buoyancy and stability;
  • Ship resistance and propulsion;
  • Ship maneuvering and radiated noise.
  • Water and environment.

Dr. Bin Xu
Dr. Yanmei Jiao
Dr. Xi Shen
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

  • CFD simulation
  • floating offshore structures
  • ocean engineering
  • hydrodynamics and propulsion

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Related Special Issue

Published Papers (5 papers)

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Research

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26 pages, 16674 KiB  
Article
A Study of the Relationship between Sand Movement and Flow Field Distribution and Wear Causes in a Multiphase Pump
by Xin Guo, Guangtai Shi, Yexiang Xiao and Xunyun Ye
J. Mar. Sci. Eng. 2024, 12(7), 1203; https://doi.org/10.3390/jmse12071203 - 17 Jul 2024
Viewed by 487
Abstract
The Rosin–Rammler function is used in this paper to model the diameter distribution of sand particles. It investigates the characteristics of sand distribution and identifies the primary factors contributing to wear on flow components in a blade-type multiphase pump, considering varying particle sizes. [...] Read more.
The Rosin–Rammler function is used in this paper to model the diameter distribution of sand particles. It investigates the characteristics of sand distribution and identifies the primary factors contributing to wear on flow components in a blade-type multiphase pump, considering varying particle sizes. The result of research shows that the blade head of the impeller and the middle section of the flow passage in the diffuser domain represent primary areas prone to sand particle accumulation. The concentration of sand particles within the diffuser surpasses that within the impeller, yet wear severity and extent are more pronounced in the impeller domain compared to the diffuser domain. Meanwhile, the movement trajectory of sand particles is linked to both shear flow and vortex flow. The wear of the front section of the impeller blade is more severe than the second half. On the pressure surface of the blade, particle Reynolds number emerges as a primary factor influencing wear, while on the suction surface, sand particle concentration plays a dominant role in determining wear. The particle concentration in the diffuser domain is the primary factor influencing wear on both the suction and pressure surfaces. The wear rate in the impeller is primarily influenced by the sand particle Reynolds number, whereas the wear rate in the diffuser domain is affected by a combination of sand particle diameter, sand particle concentration, and sand particle Reynolds number. The research findings possess significant engineering value in terms of enhancing the operational lifespan of multiphase pumps. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition)
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20 pages, 22242 KiB  
Article
Estimation of Significant Wave Height Using Wave-Radar Images
by Jae-Hoon Lee, Yoon-Seo Nam, Jaehak Lee, Yuming Liu and Yonghwan Kim
J. Mar. Sci. Eng. 2024, 12(7), 1134; https://doi.org/10.3390/jmse12071134 - 5 Jul 2024
Viewed by 600
Abstract
Characteristics of random ocean waves have been measured by different devices, and X-band marine radar is one of the typical devices. This study proposes an enhanced methodology for estimating the significant wave height of ocean waves through the analysis of X-band radar images, [...] Read more.
Characteristics of random ocean waves have been measured by different devices, and X-band marine radar is one of the typical devices. This study proposes an enhanced methodology for estimating the significant wave height of ocean waves through the analysis of X-band radar images, particularly leveraging the shadowing characteristics inherent within radar images. The enhancement of the shadowing-based algorithm is achieved by incorporating three different key physical properties of ocean waves. These include the spatial autocorrelation function (SACF) in the Smith function, the orthogonal property of mean surface slopes, and the relationship of high-order spectral moments. The enhanced algorithm is complementarily integrated with fast Fourier transform (FFT)-based spectral analysis, facilitating the determination of significant wave height without the necessity for supplementary reference measurements. Numerical tests have been conducted using synthetic and real radar images corresponding to various sea states to validate the accuracy and reliability of the proposed methodology. The results demonstrate that the proposed techniques consistently improve the estimation accuracy of significant wave heights for both synthetic and real radar images. Even though the measured real radar images used for validation are not exhaustive in terms of the amount of dataset and range of sea state severity, considering that the proposed technique is in its early development stage, it is inspiring that its effectiveness and physical validity have been demonstrated through the present study. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition)
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14 pages, 6505 KiB  
Article
Effect of Tip Clearance on Force Characteristics of Helical Axial-Flow Blade Pumps under Cavitation Conditions
by Haigang Wen, Luyao Li, Guangtai Shi, Haijun Ma and Xiaodong Peng
J. Mar. Sci. Eng. 2023, 11(12), 2299; https://doi.org/10.3390/jmse11122299 - 4 Dec 2023
Viewed by 885
Abstract
A spiral axial-flow blade pump (SABP), as the core piece of equipment in the oil and natural gas closed-gathering and transportation process, can not only transport gas–liquid mixtures with a high gas content, but can also transport gas–liquid–solid mixtures containing small amounts of [...] Read more.
A spiral axial-flow blade pump (SABP), as the core piece of equipment in the oil and natural gas closed-gathering and transportation process, can not only transport gas–liquid mixtures with a high gas content, but can also transport gas–liquid–solid mixtures containing small amounts of sand. However, due to the complexity of the distribution of transport media groups and the uncertainty of internal flow processes, large vortices often appear in the passage of the pumps, and the existence of vortices can easily induce the occurrence of pump cavitations. In the present work, a self-developed SABP was taken as the research object, and the cavitation performance of the SABP was numerically calculated. The pressure load variation under different tip clearances and different cavitation stages was analyzed, and the characteristics of the axial and radial forces were also analyzed in detail. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition)
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24 pages, 6805 KiB  
Article
Research on the Hydrodynamic Noise Characteristics of a Mixed-Flow Pump
by Qiaoyue Yang, Wei Li, Leilei Ji, Weidong Shi, Wei Pu, Yu Long and Xinrui He
J. Mar. Sci. Eng. 2023, 11(12), 2209; https://doi.org/10.3390/jmse11122209 - 21 Nov 2023
Cited by 1 | Viewed by 1060
Abstract
This study presents a comprehensive investigation of the internal noise characteristics of a mixed-flow pump by combining computational fluid dynamics (CFD) and computational acoustics. The turbulent flow field of the pump is simulated using the unsteady SST k-ω turbulence model in CFD. The [...] Read more.
This study presents a comprehensive investigation of the internal noise characteristics of a mixed-flow pump by combining computational fluid dynamics (CFD) and computational acoustics. The turbulent flow field of the pump is simulated using the unsteady SST k-ω turbulence model in CFD. The contributions of the volute, guide vanes, and impeller to the internal noise are analyzed and compared using the Lighthill theory, FW-H formula, and LMS Virtual Lab software for acoustic simulation. The research findings indicate that the energy of pressure fluctuations in the mixed-flow pump is predominantly concentrated at the blade passing frequency and its low-frequency harmonics. This suggests that the internal noise is mainly in the low-frequency range, with higher energy at the blade passing frequency and its harmonics. Under the 0.6Qdes flow condition, the flow inside the pump becomes more complex, resulting in higher sound pressure levels and sound power levels compared to higher flow conditions. However, for flow conditions ranging from 0.8Qdes to 1.2Qdes, the sound pressure levels gradually increase with increasing flow rate, with the sound pressure level at 1.0Qdes being nearly identical to that at 1.2Qdes. The analysis of sound power level spectra at different flow rates reveals that the distribution characteristics of internal vortex structures directly impact the hydrodynamic noise inside the mixed-flow pump. These research findings provide a significant theoretical basis for noise control in mixed-flow pumps. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition)
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Review

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21 pages, 345 KiB  
Review
Data-Driven Modal Decomposition Methods as Feature Detection Techniques for Flow Fields in Hydraulic Machinery: A Mini Review
by Bin Xu, Liwen Zhang, Weibin Zhang, Yilin Deng and Teck Neng Wong
J. Mar. Sci. Eng. 2024, 12(5), 813; https://doi.org/10.3390/jmse12050813 - 13 May 2024
Cited by 1 | Viewed by 662
Abstract
Cavitation is a quasi-periodic process, and its non-stationarity leads to increasingly complex flow field structures. On the other hand, characterizing the flow field with greater precision has become increasingly feasible. However, accurately and effectively extracting the most representative vibration modes and spatial structures [...] Read more.
Cavitation is a quasi-periodic process, and its non-stationarity leads to increasingly complex flow field structures. On the other hand, characterizing the flow field with greater precision has become increasingly feasible. However, accurately and effectively extracting the most representative vibration modes and spatial structures from these vast amounts of data has become a significant challenge. Researchers have proposed data-driven modal decomposition techniques to extract flow field information, which have been widely applied in various fields such as signal processing and fluid dynamics. This paper addresses the application of modal decomposition methods, such as dynamic mode decomposition (DMD), Proper Orthogonal Decomposition (POD), and Spectral Proper Orthogonal Decomposition (SPOD), in cavitation feature detection in hydraulic machinery. It reviews the mathematical principles of these three algorithms and a series of improvements made by researchers since their inception. It also provides examples of the applications of these three algorithms in different hydraulic machinery. Based on this, the future development trends and possible directions for the improvement of modal decomposition methods are discussed. Full article
(This article belongs to the Special Issue Computational Fluid Dynamics Simulation of Floating Offshore Structures—2nd Edition)
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