Numerical Simulation of Fluid-Structure Interactions by CFD

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 June 2024) | Viewed by 2888

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Department of Civil, Constructional and Environmental Engineering, Sapienza University of Rome, 00184 Rome, RM, Italy
Interests: computational hydraulics; free-surface flows; three-dimensional numerical models; curvilinear coordinates; coastal engineering; coastal sediment transport
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Special Issue Information

Dear Colleagues,

In recent years, the study of fluid–structure interactions (FSIs) has received increasing attention in various engineering fields, including ocean engineering. The interaction between ocean waves and offshore or coastal structures is one of the most critical FSI problems in this field. Numerical simulation has become a powerful and cost-effective tool for investigating ocean fluid–structure interaction (OFSI) problems. Simulations of wave motion, wave-induced flow velocity fields, energy transport and the stresses exerted on fixed or floating structures are the basis of the design and verification of engineering works such as offshore oil platforms, wave energy converters, floating dams or coastal defense structures.

This Special Issue focuses on the use of computational fluid dynamics (CFD) to simulate OFSI problems. CFD-based numerical simulations can provide valuable insights into the underlying flow physics and performance of different types of offshore structures under various ocean wave conditions. The spatial dimensions and complexity of the investigated engineering problem and the expected accuracy of the numerical results justify the adoption of different CFD methods: they can include mesh-based depth-averaged two-dimensional models, fully three-dimensional ones or the more recent meshless methods which, although more time-consuming, are suitable for simulating complex interface flows and their interaction with solid structures.

This Special Issue promotes the application of computational fluid dynamics in ocean fluid–structure interaction problems, recent advances in the adopted CFD methods and the application of existing methods to new OFSI problems. The presented studies will provide valuable insights into the flow physics and performance of offshore structures or promote their development in terms of efficiency and robustness.

Dr. Giovanni Cannata
Guest Editor

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Keywords

  • fluid–structure interaction
  • offshore structures
  • wave structure
  • floating structures
  • computational fluid dynamics
  • CFD
  • numerical simulation
  • ocean wave

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Published Papers (2 papers)

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Research

17 pages, 5244 KiB  
Article
Numerical Study on the Performance of an OWC under Breaking and Non-Breaking Waves
by Giovanni Cannata, Francesco Biondi and Marco Simone
J. Mar. Sci. Eng. 2024, 12(6), 936; https://doi.org/10.3390/jmse12060936 - 2 Jun 2024
Viewed by 876
Abstract
A numerical model for the simulation of the performance of an oscillating water column (OWC) subjected to non-breaking and breaking waves is proposed in this paper. The numerical model consists of a hydrodynamic model specifically designed to simulate breaking waves and a pneumatic [...] Read more.
A numerical model for the simulation of the performance of an oscillating water column (OWC) subjected to non-breaking and breaking waves is proposed in this paper. The numerical model consists of a hydrodynamic model specifically designed to simulate breaking waves and a pneumatic model that takes into account the air compressibility. The proposed numerical model was applied to evaluate the potential mean annual energy production from the waves of two coastal sites characterized by different hydrodynamic conditions: a deep-water condition, where the OWC interacts with non-breaking waves, and a shallow-water condition, where the OWC is subjected to breaking waves. The numerical results show that the effects of the air compressibility can be considered negligible only in numerical simulations of the performances of reduced-scale OWC devices, such as those used in laboratory experiments. We demonstrated that in real-scale simulations, the effect of the air compressibility within the OWC chamber significantly reduces its ability to extract energy from waves. The numerical results show that the effect of the air compressibility is even more significant in the case of a real-scale OWC located in the surf zone, where it interacts with breaking waves. Full article
(This article belongs to the Special Issue Numerical Simulation of Fluid-Structure Interactions by CFD)
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22 pages, 13992 KiB  
Article
Investigations into Motion Responses of Suspended Submersible in Internal Solitary Wave Field
by Zhenyang He, Wenbin Wu, Junrong Wang, Lan Ding, Qiangbo Chang and Yahao Huang
J. Mar. Sci. Eng. 2024, 12(4), 596; https://doi.org/10.3390/jmse12040596 - 30 Mar 2024
Cited by 1 | Viewed by 987
Abstract
When the underwater submersible encounters an internal solitary wave (ISW), its loadings and motions are significantly disturbed. To investigate the interaction mechanism between the suspended submersible and the ISW, a three-dimensional ISW–submersible-interaction numerical model was established, based on the computational fluid dynamics (CFD) [...] Read more.
When the underwater submersible encounters an internal solitary wave (ISW), its loadings and motions are significantly disturbed. To investigate the interaction mechanism between the suspended submersible and the ISW, a three-dimensional ISW–submersible-interaction numerical model was established, based on the computational fluid dynamics (CFD) method. The generation and propagation of the ISW was simulated in a two-layer fluid numerical wave tank, according to the eKdV theory. The standard operation equation of the submersible was introduced to simulate the six degree of freedom (6DoF) motions of the submersible combined with the overset dynamic mesh method. The motion simulation method was effectively validated by comparing it with published experimental results on the motion responses of a slender body under the ISW. Based on the constructed numerical model, the dynamic mechanisms between the suspended submersible and the ISW were studied, and the effects of the initial submerged depths and the ISW amplitudes on the dynamic responses of the submersible were revealed. According to the numerical results, the motions of the submersible have been significantly determined by its initial submerged depths. The submersible located above the ISW interface has a significant motion along the propagation direction of the ISW and its motion trajectory resembles a counterclockwise semi ellipse. The motion of the submersible located below the ISW interface follows the trace of the lower layer of fluid, which presents as an unclosed clockwise ellipse. The corresponding motions of the submersible would be increased with the increase in the ISW amplitudes. Full article
(This article belongs to the Special Issue Numerical Simulation of Fluid-Structure Interactions by CFD)
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