@article{MTMT:34332237,
	title = {Numerical Investigations on Harbor Oscillations Induced by Falling Objects},
	url = {https://m2.mtmt.hu/api/publication/34332237},
	author = {Gao, Jun-liang and Bi, Wen-jing and Zhang, Jian and Zang, Jun},
	doi = {10.1007/s13344-023-0038-y},
	journal-iso = {CHINA OCEAN ENG},
	journal = {CHINA OCEAN ENGINEERING},
	volume = {37},
	unique-id = {34332237},
	issn = {0890-5487},
	abstract = {In this paper, the open-sourced computational fluid dynamics software, OpenFOAM & REG;, is used to study the fluctuation phenomenon of the water body inside a horizontally one-dimensional enclosed harbor basin with constant water depth triggered by falling wedges with various horizontal falling positions, initial falling velocities and masses. Based on both Fourier transform analysis and wavelet spectrum analysis for the time series of the free surface elevations inside the harbor basin, it is found for the first time that the wedge falling inside the harbor can directly trigger harbor resonance. The influences of the three factors (including the horizontal falling position, the initial falling velocity, and the mass) on the response amplitudes of the lowest three resonant modes are also investigated. The results show that when the wedge falls on one of the nodal points of a resonant mode, the mode would be remarkably suppressed. Conversely, when the wedge falls on one of the anti-nodal points of a resonant mode, the mode would be evidently triggered. The initial falling velocity of the wedge mainly has a remarkable effect on the response amplitude of the most significant mode, and the latter shows a gradual increase trend with the increase of the former. While for the other two less significant modes, their response amplitudes fluctuate around certain constant values as the initial falling velocity rises. In general, the response amplitudes of all the lowest three modes are shown to gradually increase with the mass of the wedge.},
	keywords = {harbor oscillations; seiches; falling objects; resonant mode; response amplitude},
	year = {2023},
	eissn = {2191-8945},
	pages = {458-470}
}

@article{MTMT:33932219,
	title = {Modeling and Analysis of the Leading-Edge Vortex on Flapping Foil Turbines in Swing-Arm Mode},
	url = {https://m2.mtmt.hu/api/publication/33932219},
	author = {Hamada, Ahmed A. and Fuerth, Mirjam},
	doi = {10.1115/1.4057035},
	journal-iso = {J FLUID ENG-T ASME},
	journal = {JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME},
	volume = {145},
	unique-id = {33932219},
	issn = {0098-2202},
	abstract = {Hydrokinetic flapping foil turbines in swing-arm mode have gained considerable interest in recent years because of their enhanced capability to extract power, and improved efficiency compared to foils in simple mode. The performance of foil turbines is closely linked to the development and separation of the leading-edge vortex (LEV). The paper's aim is to develop a purpose-built 2D numerical model to present the capability of integrating the weighted residual finite element method (FEM) with the interface capturing technique, level-set method (LSM), in providing a high-quality numerical simulation of the flapping foil in swing-arm mode, by accurately modeling the formation and the separation of the LEV on flapping foils. The solvers were validated against well-known static and dynamic benchmark problems and the effect of the mesh density was analyzed and discussed. This paper further covers an initial investigation of the hydrodynamics of flapping foil in swing-arm mode, by studying the structure of the vortex around a NACA0012 foil. The presented method helps to provide a better understanding of the relation between the Leading-Edge Vortex creation, growth, and separation over the flapping foil in swing-arm mode and the extracted power from a hydrokinetic turbine.},
	year = {2023},
	eissn = {1528-901X}
}

@article{MTMT:33543017,
	title = {Validation of a CFD model for wave energy system dynamics in extreme waves},
	url = {https://m2.mtmt.hu/api/publication/33543017},
	author = {Katsidoniotaki, Eirini and Shahroozi, Zahra and Eskilsson, Claes and Palm, Johannes and Engström, Jens and Göteman, Malin},
	doi = {10.1016/j.oceaneng.2022.113320},
	journal-iso = {OCEAN ENG},
	journal = {OCEAN ENGINEERING},
	volume = {268},
	unique-id = {33543017},
	issn = {0029-8018},
	year = {2023},
	eissn = {1873-5258}
}

@article{MTMT:33932220,
	title = {Hydrodynamic performance analysis of a new hybrid wave energy converter system using OpenFOAM},
	url = {https://m2.mtmt.hu/api/publication/33932220},
	author = {Masoomi, Mobin and Sarlak, Hamid and Rezanejad, Kourosh},
	doi = {10.1016/j.energy.2023.126807},
	journal-iso = {ENERGY},
	journal = {ENERGY},
	volume = {269},
	unique-id = {33932220},
	issn = {0360-5442},
	abstract = {In this research study, a newly proposed hybrid device of Wave Energy Converters (WEC) is investigated by considering computational fluid dynamic (CFD)-based numerical wave tanks (NWTs). The open-source CFD code solver, OpenFOAM (Open Field Operation and Manipulation) is implemented, which is numerically solved the Reynolds-averaged Navier-Stokes (RANS) equations to simulate the two-phase flow. The hybrid system consists of an Oscillating Water Column (OWC) and a point absorber (Wavestar) device installed in a shared platform. The main goal is to recognize how wave diffractions caused by the adjacent floating body could affect the rate of power absorption by the Fixed-OWC. This aim is followed by a 2D numerical analysis of three different instal-lation configurations, variable intervals between the Wavestars' buoy and the Fixed-OWCs' front wall, in four different wavelengths with and without Power Take-Off (PTO). Finally, the efficiency characteristics of the in-tegrated system such as free surface velocity and air pressure within the chamber, besides floating body motions are investigated and compared for the hybrid system. Although the overall assessment for 28 different case studies reveals an efficiency reduction in some cases, the superiority of this hybrid plan is recording several incremental efficiency rates.},
	keywords = {Oscillating water column; Wavestar; Hybrid wave energy converter; OverInterDyMFoam},
	year = {2023},
	eissn = {1873-6785}
}

@article{MTMT:33942985,
	title = {Numerical study on the capture capacity of coastal Seabin-type debris collection devices under regular waves},
	url = {https://m2.mtmt.hu/api/publication/33942985},
	author = {Ma, Zhe and Gao, Mingyue and Zhai, Gangjun},
	doi = {10.1016/j.oceaneng.2022.113111},
	journal-iso = {OCEAN ENG},
	journal = {OCEAN ENGINEERING},
	volume = {267},
	unique-id = {33942985},
	issn = {0029-8018},
	abstract = {Intensive human activities have led to an increase in the amount of debris in waterways and oceans. Seabin, which uses a water pump to accomplish waste recycling, is a typical refuse-removal device in ports and wharves. Some studies of Seabin often ignore the effect of water pumping on the flow fields or wave actions on the motion of floating garbage. To accurately simulate the water pumping and reproduce the process of litter drift, the twophase solver with mass sink function was developed to simulate water pumping. This method can overcome the limitations of the boundary method in simulating pumping, while simultaneously working with the wavegenerating boundary method to realize the simultaneous action of the water pump and wave. And the overset grid method was used to simulate the motion of litter. Based on the simulation results, it is proved that the mass sink method proposed in this paper can accurately simulate the pumping of water. The time and velocity of the motion of floating debris under the action of the waves were also obtained by simulation, which means that the simulation of the motion of floating debris under the combined action of Seabin pumping and waves is realized.},
	keywords = {Wave action; Seabin; Mass sink; Floating marine debris},
	year = {2023},
	eissn = {1873-5258},
	orcid-numbers = {Ma, Zhe/0000-0003-0960-8066}
}

@article{MTMT:34332238,
	title = {DualSPHysics modelling to analyse the response of Tetrapods against solitary wave},
	url = {https://m2.mtmt.hu/api/publication/34332238},
	author = {Mitsui, Jun and Altomare, Corrado and Crespo, Alejandro J. C. and Dominguez, Jose M. and Martinez-Estevez, Ivan and Suzuki, Tomohiro and Kubota, Shin-ichi and Gomez-Gesteira, Moncho},
	doi = {10.1016/j.coastaleng.2023.104315},
	journal-iso = {COAST ENG},
	journal = {COASTAL ENGINEERING},
	volume = {183},
	unique-id = {34332238},
	issn = {0378-3839},
	abstract = {The stability of Tetrapod armour units against solitary waves using Smoothed Particle Hydrodynamics (SPH) method is analysed in this work. To this purpose, the SPH-based DualSPHysics code was coupled with the multiphysics library Project Chrono. Tetrapod units are placed above a submerged mound. DualSPHysics solves the fluid-solid interaction, while Project Chrono solves the Tetrapod-mound interactions based on the contact and material properties of the block surface. The motion of the units during the simulation was compared with the physical model experiments where Tetrapods are made of mortar, and the mound is in PVC. The numerical results expressed as displacements of Tetrapods and damage ratio under different solitary waves are in reasonable agreement with the experiments, proving the capability of the DualSPHysics code to simulate chal-lenging environments under the same numerical framework. The validated tool is then applied to study the stability for different coefficients of friction between mound and Tetrapods aiming at simulating the effects of different materials and surface roughness.},
	keywords = {Tetrapods; Solitary wave; SPH; DualSPHysics; Armour damage},
	year = {2023},
	eissn = {1872-7379},
	orcid-numbers = {Altomare, Corrado/0000-0001-8817-0431}
}

@article{MTMT:33932218,
	title = {Numerical Performance of a Buoy-Type Wave Energy Converter with Regular Short Waves},
	url = {https://m2.mtmt.hu/api/publication/33932218},
	author = {Sosa, Carlos and Marino-Tapia, Ismael and Silva, Rodolfo and Patino, Rodrigo},
	doi = {10.3390/app13085182},
	journal-iso = {APPL SCI-BASEL},
	journal = {APPLIED SCIENCES-BASEL},
	volume = {13},
	unique-id = {33932218},
	abstract = {The numerical performance of a buoy-type wave energy converter (WEC) under regular wave conditions is described in this paper. The open-source computational fluid dynamics software OpenFOAM((R)) was used to couple a grid for the solid body motion of the WEC, with the grid designed for wave propagation, in order to calculate buoy movement parameters. The buoy has a horizontal, cylindrical structure, with a pivot point for semi-axis rotation. Five buoy-radiuses were analyzed, as this parameter considerably increases the efficiency of the WEC point absorber. To better understand the interaction of the WEC with the waves, the transmission and reflection coefficients were calculated, along with two non-linear parameters: skewness and asymmetry. The results indicate that, with this system, more power can be extracted from shorter waves, T = 4 s, compared to T = 8 s of the same wave height. This implies that a small buoy could be employed at sites with this prevailing wave regime, without a decrease in efficiency and with considerable cost reductions. Finally, this WEC increases the values of wave skewness, which is linked to onshore sediment transport; therefore, if appropriately designed, WEC arrays installed near the coast could also promote onshore sediment transport.},
	keywords = {Sustainable energy; SEDIMENT TRANSPORT; computational fluid dynamics (CFD); Wave energy converter (WEC); wave asymmetries},
	year = {2023},
	eissn = {2076-3417}
}

@article{MTMT:33400906,
	title = {CFD simulation of floating body motion with mooring dynamics: Coupling MoorDyn with OpenFOAM},
	url = {https://m2.mtmt.hu/api/publication/33400906},
	author = {Chen, Haifei and Hall, Matthew},
	doi = {10.1016/j.apor.2022.103210},
	journal-iso = {APPL OCEAN RES},
	journal = {APPLIED OCEAN RESEARCH},
	volume = {124},
	unique-id = {33400906},
	issn = {0141-1187},
	abstract = {It is increasingly popular to use Computational Fluid Dynamics (CFD) models to study floating structures sub-jected to ocean waves, especially when it comes to applications of floating offshore wind turbines and Wave Energy Converters (WECs). Mooring dynamics are currently lacking in most of these applications. This paper presents a coupled simulation study of moored floating body motion by coupling two open-source libraries: a finite volume CFD toolbox, OpenFOAM, and a lumped-mass mooring model, MoorDyn. The instantaneous floating body position and velocity are passed from the body motion solver in the CFD model to the mooring model to calculate the fairlead kinematics. The mooring reaction forces, which are calculated by MoorDyn after updating the mooring system states, are then returned to the body motion solver to update the floating body motion. Both mesh deformation and overset mesh methods are used as the mesh motion solver in the CFD model to account for the floating body motion. The coupled model was validated against experimental measurements for a floating box moored with four catenary lines under the action of regular waves, which came from a pre-liminary test campaign for WECs. Apart from the lumped-mass mooring model, the present work also coupled a quasi-static mooring model and a finite element model with the floating body motion solver in OpenFOAM. The mooring line tensions predicted by these models were compared. The coupled model equipped with three mooring line codes may be further used to carry out survivability studies of FOWTs and WECs subject to severe sea states.},
	keywords = {WAVES; Fluid-structure interaction; Floating body; OpenFOAM; overset; Mooring dynamics; MoorDyn},
	year = {2022},
	eissn = {1879-1549}
}

@article{MTMT:33400905,
	title = {Effects of Slide Shape on Impulse Waves Generated by a Subaerial Solid Slide},
	url = {https://m2.mtmt.hu/api/publication/33400905},
	author = {Huang, Chiung-Shu and Chan, I-Chi},
	doi = {10.3390/w14172643},
	journal-iso = {WATER-SUI},
	journal = {WATER},
	volume = {14},
	unique-id = {33400905},
	abstract = {We review several historical landslide tsunami events and perform a set of numerical experiments to investigate the particular effects of slide shape on impulsive waves generated by a subaerial solid slide. The computational model is based on OpenFOAM, which solves 2D RANS formulations with a volume of fluid method used to capture the air-water interface. We consider triangular prism shaped solid slides in our numerical experiments and introduce a slide shape parameter sigma to describe the front face steepness of the slide. Observations from the experiments reveal that slide shape can have significant impacts on the characteristics of impulsive waves, such as maximum wave amplitude and its location, impact energy conversion rate, and the amplitude ratio between the first wave crest and the second crest in the leading wave group. In particular, the maximum wave amplitude is inversely proportional to sigma; the impact energy conversion ratio decays exponentially with sigma; and the wave period is almost independent of sigma.},
	keywords = {NUMERICAL EXPERIMENTS; OpenFOAM; solid slide; impulsive wave; slide shape},
	year = {2022},
	eissn = {2073-4441}
}

@article{MTMT:33399785,
	title = {Numerical modeling of extreme wave interaction with point-absorber using OpenFOAM},
	url = {https://m2.mtmt.hu/api/publication/33399785},
	author = {Katsidoniotaki, Eirini and Goteman, Malin},
	doi = {10.1016/j.oceaneng.2021.110268},
	journal-iso = {OCEAN ENG},
	journal = {OCEAN ENGINEERING},
	volume = {245},
	unique-id = {33399785},
	issn = {0029-8018},
	abstract = {Extreme waves are critical for the WEC's development. CFD toolboxes have been widely used in the simulation of extreme waves-structure interaction. However, the quality of the mesh is a sensitive issue; the WEC's large response can lead to mesh deformation and subsequent numerical instability. In this paper, 100-year extreme waves are chosen from the environmental contour of the Humboldt Bay site in California, and their interaction with the WEC is modeled using the open-source CFD software OpenFOAM. The overset mesh technique is an advanced method recently available in OpenFOAM, able to handle great body motions. Here, the overset method is utilized and compared with the commonly used morphing method. The two methods provide equivalent results, but the latter is prone to the mesh deformation and fails to complete the simulations. Regarding the impact of extreme waves on WECs, the results further show that the combination of wave height and steepness is critical; i.e., the 100-year wave height does not necessarily result in the maximum forces, but rather steeper sea states tend to contribute in higher wave loadings. Additionally, the WEC is studied for 40% higher generator's damping, as it is a common control strategy during the harsh environmental conditions.},
	keywords = {Overset mesh; Wave energy converter; Extreme waves; 100-year return period; Point-absorber; OpenFOAMv1906},
	year = {2022},
	eissn = {1873-5258},
	orcid-numbers = {Goteman, Malin/0000-0001-9213-6447}
}

@article{MTMT:32746744,
	title = {Numerical investigation of the influence of wave parameters on maneuvering hydrodynamic derivatives in regular head waves},
	url = {https://m2.mtmt.hu/api/publication/32746744},
	author = {Ma, Chengqian and Hino, Takanori and Ma, Ning},
	doi = {10.1016/j.oceaneng.2021.110394},
	journal-iso = {OCEAN ENG},
	journal = {OCEAN ENGINEERING},
	volume = {244},
	unique-id = {32746744},
	issn = {0029-8018},
	year = {2022},
	eissn = {1873-5258},
	orcid-numbers = {Ma, Chengqian/0000-0002-1790-4757; Hino, Takanori/0000-0002-5811-7688}
}

@article{MTMT:33400907,
	title = {CFD analysis of added mass, damping and induced flow of isolated and cylinder-mounted heave plates at various submergence depths using an overset mesh method},
	url = {https://m2.mtmt.hu/api/publication/33400907},
	author = {Pinguet, Romain and Benoit, Michel and Molin, Bernard and Rezende, Flavia},
	doi = {10.1016/j.jfluidstructs.2021.103442},
	journal-iso = {J FLUID STRUCT},
	journal = {JOURNAL OF FLUIDS AND STRUCTURES},
	volume = {109},
	unique-id = {33400907},
	issn = {0889-9746},
	abstract = {Fluid-structure interaction processes of heave damping plates in forced vertical motion are investigated using a CFD numerical model. First, a single isolated disk is considered with two submergence depths, including a case where the disk is very close to the mean water level with d/D = 1/12 (d is the submergence depth and D the diameter of the disk). Then, the case of a disk attached to a vertical cylinder is analyzed, corresponding to one leg of a semi-submersible floater. The open source software OpenFOAM (R) is used to model the flow around the disk and to extract the relevant hydrodynamic coefficients of the structures. The dynamics of the structure and induced flow and free surface waves are tackled with the overset mesh tool implemented in OpenFOAM (R). Considering the rotational symmetry of the problem, an axisymmetry model is used with wedge symmetry boundary conditions. The results are compared with experimental measurements and linearized potential flow modeling approaches with empirical correction. The CFD results of the models of both structures predict well the experimental measurements, including large oscillation periods and various amplitudes of heaving motion, where the potential model results are deteriorated.(c) 2021 Elsevier Ltd. All rights reserved.},
	keywords = {RADIATION; Damping; CFD; overset; Added mass; Heave plates},
	year = {2022},
	eissn = {1095-8622},
	orcid-numbers = {Benoit, Michel/0000-0003-4195-2983; Molin, Bernard/0000-0002-1378-5973}
}

@article{MTMT:32746741,
	title = {Parametric studies on sloshing in a three-dimensional prismatic tank with different water depths, excitation frequencies, and baffle heights by a Cartesian grid method},
	url = {https://m2.mtmt.hu/api/publication/32746741},
	author = {Jin, Qiu and Xin, Jianjian and Shi, Fulong and Shi, Fan},
	doi = {10.1016/j.ijnaoe.2021.08.005},
	journal-iso = {INT J NAV ARCH OCEAN},
	journal = {International Journal of Naval Architecture and Ocean Engineering},
	volume = {13},
	unique-id = {32746741},
	issn = {2092-6782},
	year = {2021},
	eissn = {2092-6790},
	pages = {691-706},
	orcid-numbers = {Xin, Jianjian/0000-0002-1358-7686}
}

@article{MTMT:32406789,
	title = {Response of Point-Absorbing Wave Energy Conversion System in 50-Years Return Period Extreme Focused Waves},
	url = {https://m2.mtmt.hu/api/publication/32406789},
	author = {Katsidoniotaki, Eirini and Nilsson, Erik and Rutgersson, Anna and Engstrom, Jens and Goteman, Malin},
	doi = {10.3390/jmse9030345},
	journal-iso = {J MAR SCI ENG},
	journal = {JOURNAL OF MARINE SCIENCE AND ENGINEERING},
	volume = {9},
	unique-id = {32406789},
	abstract = {This work evaluates the survivability of a point-absorbing wave energy converter at sea states along and inside the 50-year environmental contour for a selected-site in North Sea, by utilizing CFD simulations. Focused wave groups based on NewWave theory are used to model the extreme waves. The numerical breaking waves have been previously predicted by the analytical breaking criterion, showing that the latter provides an accurate estimate for the breaking state. The forces on key components of the device and the system's dynamics are studied and compared. Slamming loads are identified in the interaction with extreme waves, particularly with breaking waves, and compared with the analytical formulas for slamming estimation as suggested by industrial standards. Considering the extreme wave characteristics, the accompanied phenomena and the resulting WEC's response, this work contributes to the identification of the design-waves given the environmental contour of the selected site. The top-left side of the contour is identified as the more critical area as it consists of steep and high waves inducing significant nonlinear phenomena, resulting in high loads.},
	keywords = {CFD; OpenFOAM; Overset mesh; Extreme waves; offshore WEC; breaking focused waves; slamming loads; 50-years return period},
	year = {2021},
	eissn = {2077-1312},
	orcid-numbers = {Nilsson, Erik/0000-0003-3740-9507; Rutgersson, Anna/0000-0001-7656-1881; Goteman, Malin/0000-0001-9213-6447}
}

@article{MTMT:31798280,
	title = {Investigation of Turbulence Modeling for Point-Absorber-Type Wave Energy Converters},
	url = {https://m2.mtmt.hu/api/publication/31798280},
	author = {Windt, Christian and Davidson, Joshua Patrick and Ringwood, John},
	doi = {10.3390/en14010026},
	journal-iso = {ENERGIES},
	journal = {ENERGIES},
	volume = {14},
	unique-id = {31798280},
	issn = {1996-1073},
	year = {2020},
	eissn = {1996-1073}
}

@article{MTMT:31737915,
	title = {Wave-structure interaction of wave energy converters: a sensitivity analysis},
	url = {https://m2.mtmt.hu/api/publication/31737915},
	author = {Windt, Christian and Davidson, Joshua Patrick and Schmitt, Pal and Ringwood, John V},
	doi = {10.1680/jencm.19.00033},
	journal-iso = {P I CIVIL ENG-ENG COMPUT MECH},
	journal = {PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-ENGINEERING AND COMPUTATIONAL MECHANICS},
	volume = {173},
	unique-id = {31737915},
	issn = {1755-0777},
	abstract = {Measurement uncertainties are inevitable during physical wave tank tests. Therefore, when validating a numerical wave tank against experiments, knowledge of the uncertainties in the physical experiments, and the sensitivity of the body dynamics to such uncertainties, is crucial. Specifically, the inertial properties, as well as the location of the centre of mass (CoM), which are challenging to measure accurately, can have a significant influence on the system dynamics. On the basis of test cases of the Collaborative Computational Project in Wave Structure Interaction Blind Test Series 2, this paper presents a sensitivity analysis of the agreement between experimental and numerical data sets to the quality of the incident, focused wave, as well as the inertial properties and the location of the CoM. A significant influence on the modelled system dynamics can be observed when changing the system parameters, resulting in a variation of the observed error of up to 80 percentage points for pitch motion.},
	keywords = {Renewable energy; hydraulics & hydrodynamics; Offshore engineering},
	year = {2020},
	eissn = {1755-0785},
	pages = {144-158},
	orcid-numbers = {Schmitt, Pal/0000-0001-8455-952X}
}