Dynamic orifice flow model and compartment models for flooding simulation of a damaged ship

Lee, Gyeong Joong

doi:10.1016/j.oceaneng.2015.09.051

Cited by 38 publications

(15 citation statements)

References 2 publications

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“…On the other hand, when the breach is large and internal obstacles are small, accounting for the inflow momentum flux becomes more important. Lee (2015) introduces a new simulation method for progressive flooding, based on a dynamic orifice equation, whereas the common practice is to use quasi-static Bernoulli method. The new approach is shown to avoid numerical stability problems, and it is demonstrated with the simulation of the Sewol accident.…”

Section: Numerical and Experimental Methodsmentioning

confidence: 99%

“…However, it is also pointed out that the main challenge is obtaining accurate data on the damage, actual loading condition, possible cargo shift and environmental factors. The flooding of the Sewol ferry ( Figure 9) is also studied by Lee (2015), as an example of using the dynamic orifice equation for flooding simulation.…”

Section: Numerical and Experimental Methodsmentioning

confidence: 99%

“…Visualizations of the simulation results (upper left; initial stage, upper right: when the coast guard arrived, lower left: when the last rescue action, lower right: final state). Adapted fromLee (2015).…”

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confidence: 99%

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An overview of the current research on stability of ships and ocean vehicles: The STAB2018 perspective

et al. 2019

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The paper provides an insight into contemporary research on ship stability and identifies the possible directions for future research by reviewing a selection of papers published in STAB2015, ISSW2016 & 2017. These works have been organized in different sections, according to the main thematic areas of research, covering intact and damage stability, regulatory issues including probabilistic approaches, advanced numerical methods for ship motion and stability failure prediction including roll damping, operational issues related to ship stability and environmental modelling. Furthermore, the educational potential of STAB/ISSW is exemplified. This review paper is a joint effort within the SRDC (Stability R&D Committee).

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Section: Numerical and Experimental Methodsmentioning

confidence: 99%

Section: Numerical and Experimental Methodsmentioning

confidence: 99%

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An overview of the current research on stability of ships and ocean vehicles: The STAB2018 perspective

et al. 2019

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“…During the past decade, several time-domain flooding simulation tools have been developed, such as Jasionowski (2001); Ruponen (2007); Dankowski (2013); Lee (2015); and Ypma and Turner (2019), enabling calculation of flooding progression in the complex arrangement of compartments and openings of a large passenger ship. Typically, it is assumed that water levels in the flooded compartments are horizontal, and Bernoulli's theorem is used to calculate the flow rates in the openings.…”

Section: Introductionmentioning

confidence: 99%

On the alternative approaches to stability analysis in decision support for damaged passenger ships

Ruponen

Pennanen

Manderbacka

2019

WMU J Marit Affairs

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A decision support system with damage stability analysis has been recognized as an important tool for passenger ships. Various software applications have been developed and taken into use over the years, without a direct link to any compelling requirement, set forth in the international regulatory framework. After the Costa Concordia accident, new regulations have been established, setting minimum requirements for a decision support system, as an extension to a loading computer. Yet, more advanced systems have been developed recently, aiming at providing valuable additional information on the predicted development of the stability of the damaged ship. This paper presents these alternative decision support systems with damage stability analysis methods for flooding emergencies on passenger ships. The technical background, usability, and usefulness of the various approaches are compared and discussed, taking into account the important statutory approval point of view. In addition, practical examples, including past accidents, are presented and discussed.

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“…Previously, both the model test and explicit simulation methods were conducted to study the air compression of a flooded compartment. The dynamics between the air, water, and compartment were analyzed and the applied methods estimated accuracy well [7,[16][17][18][19], while a new model was proposed for vented compartments, an accumulator model, which can adjust the inner pressure automatically, was proposed for use even in systems with many compartments and openings, and especially for fully flooded compartments [20]. In this paper, a comprehensive time domain simulation of damage flooding is performed on the basis of the CD Adapco STARCCM+.…”

Section: Introductionmentioning

confidence: 99%

Time Domain Simulation of Damage Flooding Considering Air Compression Characteristics

Zhang¹,

Lin²,

Li³

et al. 2019

Water

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An accurate analysis of the entire flooding process is critical to assess the damaged stability when a ship encounters distressed accidents such as collision, stranding, or grounding. Among many factors affecting the flooding process and damaged stability, the complex effect of air compression is significant and worthy of further research. In this paper, through establishing scenarios of the damage flooding for a cruise ship, the commercial software CD Adapco STARCCM+ is applied to perform time domain simulation of flooding processes under different ventilation levels. The basic mathematical models about air compression and specific simulation settings of computational fluid dynamics (CFD) are presented in detail. The simulation results show that water ingression results in an increase of air pressure and density inside the flooded compartment. The corresponding air compression can significantly delay the flooding process if the ventilation level is limited to a certain ratio. Finally, the stability of the damaged ship is affected.

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Dynamic orifice flow model and compartment models for flooding simulation of a damaged ship

Cited by 38 publications

References 2 publications

An overview of the current research on stability of ships and ocean vehicles: The STAB2018 perspective

An overview of the current research on stability of ships and ocean vehicles: The STAB2018 perspective

On the alternative approaches to stability analysis in decision support for damaged passenger ships

Time Domain Simulation of Damage Flooding Considering Air Compression Characteristics

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