3D Numerical Simulations of Green Water Impact on Forward-Speed Wigley Hull Using Open Source Codes

Chen, Linfeng; Wang, Ying; Wang, Xueliang; Cao, Xueshen

doi:10.3390/jmse8050327

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…Although the 0.3 m wave length  correspond to vessel length L have /L = 2 is not consider as heave and pitch resonance frequency for a ship shaped floating vessel [2] [10], the water are able to wet the vessel deck. As a result, the green water on deck can affect the vessel motion as per discuss in previous sub-section and also it is believed that water on deck can affect the ship loss of stability in particular case [11].…”

Section: Green Water On Deckmentioning

confidence: 99%

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RANS CFD Model for Global Performance Evaluation of Floating Vessel in Extreme Head Waves

Ardhiansyah

Prastianto

Djatmiko

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Extreme waves acting on the floating vessel would cause serious physical behavior and could cause a catastrophic incident. Such phenomena should be put of high interest during the designing step of the floating vessel. The numerical CFD (Computational Fluid Dynamics) viscous fluid approach along with the recent development of computer hardware gives us advantages to simulate a huge number of scenarios in the very early design phase. The current study will explain the CFD method to investigate the global performance of stationer floating vessel Fn = 0 on its motion and green water occurrence due to extreme waves λ/L = 2.0. Based on the simulation results, the CFD model can handle well the green water on deck phenomenon during extreme head waves. The water on deck affected vessel pitch motion amplitude not symmetric under regular waves i.e. 8 degrees by stern and 6 degrees by bow. Similar results were also found in heave motion amplitude by the maximum +4 centimeter and minimum -12 centimeter. Those asymmetric results of heave & pitch motion amplitude under regular waves indicate the contribution of green water to the vessel motion. In addition, green water on deck only affects the motion amplitude but not the motion frequency.

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Section: Green Water On Deckmentioning

confidence: 99%

“…After the simulation, the result show that the vessel motion is significantly impact the green water with the obtained result from fixed object. A similar method also presented by [2] to investigate the green water impact on the forward-speed vessel. They implement RANS CFD solvers from open-source code namely OpenFOAM to cover the problems.…”

mentioning

confidence: 99%

RANS CFD Model for Global Performance Evaluation of Floating Vessel in Extreme Head Waves

Ardhiansyah

Prastianto

Djatmiko

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…Research performed on fixed structures, for example [2,6,9,11,19,30,50,54,55], has been valuable in understanding important physical phenomena related to the patterns, elevations, and kinematics of such events. However, green water behavior can be different if the structures are moving, such as when they are floating freely (e.g., free heave-pitch oscillation [56]), when they are moored (e.g., [1,21,22,57]), or when they move with forward speed (e.g., [58][59][60][61][62][63][64]).…”

Section: Factors That Influence Green Water Propagationmentioning

confidence: 99%

On the Evolution of Different Types of Green Water Events

Hernández-Fontes

Hernández

Mendoza

et al. 2021

Water

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Green water events may present different features in the initial stage of interaction with the deck of a structure. It is therefore important to investigate the evolution of different types of green water, since not all the events interact with the deck at the same time. In this paper, the evolution of three types of green water events (dam-break, plunging-dam-break, and hammer-fist) are studied. The water surface elevations and volumes over the deck in consecutive green water events, generated by incident [wave trains in a wave flume, were analyzed using image-based methods. The results show multiple-valued water surface elevations in the early stage of plunging-dam-break and hammer-fist type events. Detailed experimental measurements of this stage are shown for the first time. The effect of wave steepness on the duration of the events, maximum freeboard exceedance, and volumes were also investigated. Although the hammer-fist type showed high freeboard exceedances, the plunging-dam-break type presented the largest volumes over the deck. Some challenges for further assessments of green water propagation are reported.

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“…The unexpected hydrodynamic loads that can be generated by water volumes shipping on the deck of marine structures are of particular interest in coastal, ocean and offshore engineering [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. These events can cause operational problems or even structural damage [17], sometimes significantly overloading the structures.…”

Section: Introductionmentioning

confidence: 99%

On the Evolution of Different Types of Green Water Events—Part II: Applicability of a Convolution Approach

Hernández-Fontes

Mendoza

Silva

et al. 2022

Water

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Recent research related to the evolution of different types of green water events, generated in wave flume experiments, has shown that some events, such as plunging-dam-break (PDB) and hammer-fist (HF) types, can present multiple-valued water surface elevations during formation at the bow of the structure. However, the applicability of analytical models to capture the evolution (i.e., the spatio-temporal variation of water elevations) of these events has not been tested thoroughly. This could be useful when estimating green water loads in the preliminary design stage of marine structures. The present work extends the research by Fontes et al. (On the evolution of different types of green water events, Water, 13, 1148, 2021) to examine the applicability of an analytical convolution approach to represent the variation in time of single-valued water elevations of different types of green water events generated by incident wave trains, particularly PDB and HF types. Detailed experimental measurements using high-speed video in wave flume experiments were used to verify the applicability of the model for single and consecutive green water events of type PDB and HF. The present work is a tentative attempt to compare an analytical approach for HF evolution. Results were also compared with the classic analytical dam-break approach. It was found that the convolution model allows the variation of water elevations in time to be captured better in comparison with the dam-break approach. The convolution model described the trend of water elevations well, particularly at the bow of the structure. The model captured the peak times well in single and consecutive events with multiple-valued water surfaces. Results suggest that this conservative and simplified approach could be a useful engineering tool, if improved and extended, to include the evolution of green water events in time domain simulations. This could be useful in the design stages of marine structures subject to green water events.

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3D Numerical Simulations of Green Water Impact on Forward-Speed Wigley Hull Using Open Source Codes

Cited by 6 publications

References 26 publications

RANS CFD Model for Global Performance Evaluation of Floating Vessel in Extreme Head Waves

RANS CFD Model for Global Performance Evaluation of Floating Vessel in Extreme Head Waves

On the Evolution of Different Types of Green Water Events

On the Evolution of Different Types of Green Water Events—Part II: Applicability of a Convolution Approach

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