CFD simulation of loadings on circular duct in calm water and waves

Bakica, Andro; Vladimir, Nikola; Gatin, Inno; Jasak, Hrvoje

doi:10.1080/17445302.2020.1730082

Cited by 12 publications

(8 citation statements)

References 32 publications

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“…For full-scale ship hydrodynamic applications, Reynolds Averaged Navier-Stokes (RANS) is known to provide a quick solution as it does not require significant computational power. Full-scale self-propulsion studies revealed that RANS numerical model is able to provide good quality predictions of the propeller forces and moment (Ponkratov and Zegos, 2015;Jasak et al, 2019;Bakica et al, 2020). These investigations are in line with the results of the Lloyds Register First Full-scale Ship Hydrodynamics Workshop (Lloyds Register, 2016).…”

Section: Introductionsupporting

confidence: 59%

Detailed analysis of the flow within the boundary layer and wake of a full-scale ship

2020

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This article presents a detailed numerical flow assessment of the boundary layer and wake of a full-scale cargo ship. The assessment was conducted using a sophisticated numerical approach that is able to resolve large turbulent scale vortices contained in the flow. The physical flow features of the boundary layer and wake investigated include mean-velocity, near-wall shear stress and vorticity fields. Also, the evolution of the wake from the thick boundary layer over the stern is displayed and analysed in the highest possible detail. Additionally, the detailed information extracted from the boundary layer and wake was the primary input to assess the overall hydrodynamic efficiency of the full-scale general cargo ship. The analysis method followed during this work has been a determinant factor for fast and efficient design of energy saving devices, propellers or rudders that work within the limits of the boundary layer of a ship. In particular, this thorough analysis avoided the necessity to use the commonly used practice of trial and error that is typically followed in the maritime industry.

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Section: Introductionsupporting

confidence: 59%

Detailed analysis of the flow within the boundary layer and wake of a full-scale ship

2020

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“…Self-propulsion simulations in full scale revealed that RANS could provide accurate propeller thrust and torque predictions using the sliding mesh approach (Ponkratov and Zegos, 2015;Pena et al, 2019), or the actuator disc approach (Jasak et al, 2019;Bakica et al, 2020). Both approaches have demonstrated provide results in line with the Lloyds Register First Full-scale Ship Hydrodynamics Workshop (Lloyds Register, 2016).…”

Section: Self-propulsionmentioning

confidence: 83%

A review on the turbulence modelling strategy for ship hydrodynamic simulations

Pena

Huang

2021

Ocean Engineering

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“…Compared to all possible improvements with respect to marine propulsion, the ESDs provide one of the least expensive alternatives, although it should be clearly stated that not every ESD can be beneficial for a specific type of ship. Essentially, these devices recover energy losses at the vicinity of the propeller, so for each device to operate properly, there must be a specific type of energy loss present in order for the ESD operational profile to be effective [32], [33].…”

Section: The Installation Of Energy-saving Devicesmentioning

confidence: 99%

Advanced technical solutions for marine pollution control in the Adriatic Sea

Perčić¹,

Vladimir²,

Jovanović³

et al. 2022

Rad Hrvatske akademije znanosti i umjetnosti

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The major environmental problems within the maritime sector are atmospheric pollution due to the extensive use of fossil fuels in ship power systems, as well as seawater pollution from various sources (e.g. oil spills, microplastic, acidification, etc.). Due to their negative effect on the environment, human health and marine ecosystem, they should be carefully controlled. The studies on environmental problems of the maritime sector are more focused on atmospheric pollution, mainly thanks to the Paris Agreement. The ships are mostly powered by conventional power systems (diesel engines), and their negative effect on the environment would be lower with the implementation of some measures for emission reduction. In this paper, the outcomes of the research into the advanced technical measures for maritime pollution control are summarized, where the emphasis is put on ro-ro passenger ships engaged in the Croatian short-sea shipping sector. The results of the performed Life-Cycle Assessment (LCA) and Life-Cycle Cost Assessment (LCCA) suggested that conventional power systems should be modernized by ship electrification. This solution is represented as the most cost-effective and the most environmentally friendly solution regarding air pollution reduction. Furthermore, regarding seawater protection, several aspects of the advanced early warning system, that is being developed by the authors, are discussed. Finally, in line with the global trends in the maritime sector, a review on increasing the degree of autonomy of ships is given, as one of the most important topics for the near future.

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CFD simulation of loadings on circular duct in calm water and waves

Cited by 12 publications

References 32 publications

Detailed analysis of the flow within the boundary layer and wake of a full-scale ship

Detailed analysis of the flow within the boundary layer and wake of a full-scale ship

A review on the turbulence modelling strategy for ship hydrodynamic simulations

Advanced technical solutions for marine pollution control in the Adriatic Sea

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