Numerical investigation on the effect of homogenous roughness due to biofouling on ship friction resistance

Regitasyali, S; Aliffrananda, M. H. N.; Hermawan, Yuni; Hakim, Muhammad Luqman; Utama, I Ketut Aria Pria

doi:10.1088/1755-1315/972/1/012026

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Consequently, blockings are also utilized in this computing field. The computational domain was intentionally intended to be fully viscous in order to accurately simulate the frictional resistance of the foil [17]. The foil's side walls were given symmetry.…”

Section: Computational Domainmentioning

confidence: 99%

Numerical investigations on Hydrofoil Performance due to Homogeneous Roughness

Aisyah,

Sutardi

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Adding a foil system to catamaran shups, also known as Hydrofoil Supported Catamarans (hysucat), is one method of reducing energy consumption and carbon emissions. By taking advantage of the lifting force of the foil, the implementation of a foil system can efficiently decrease a vessel’s draft and consequently reduce the ship’s resistance. However, continually submerged areas of the ship’s hull will be vulnerable to biofouling. As biofouling grows, the hull becomes rough. As a result of increased frictional resistance, rough surfaces may lower the performance of a system, according to fluid mechanics. This study aims to investigate the impact of foil roughness on its work performance. To achieve this, a computational fluid dynamics (CFD) numerical method will be set up with a modified wall function employed for roughness modelling in simulation. The specified roughness height values (ks ) values, which range from 81.25 to 325.00 to 568.75 in µm, represent the general hull roughness. The results reveal that a rough surface may negatively affect the hydrofoil’s operational performance by raising the resistance significantly.

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Section: Computational Domainmentioning

confidence: 99%

Numerical investigations on Hydrofoil Performance due to Homogeneous Roughness

Aisyah,

Sutardi

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The current situation is the main focus of efforts to stop climate change and global warming 15,16,50) , so reducing emissions on HSMVs is a challenge. Several methods to reduce emissions on board include 9,51) : optimization of hull shape [52][53][54][55] , weather routing 56,57) , maintaining a clean hull from biofouling [58][59][60][61][62][63][64][65][66][67] use of more environmentally friendly fuels [68][69][70][71][72] , optimization of propellers 73,74) , using additional environmentally friendly energy resources 75) .…”

Section: Introductionmentioning

confidence: 99%

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Muhammad Luqman Hakim,

Purnamasari,

Muryadin

et al. 2023

Evergreen

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Indonesia is an archipelago made up of a large number of islands, many of which are small and isolated. For effective connection of the islands, it is crucial to have efficient and welldesigned marine transportation systems. High-speed marine vehicles (HSMVs) are suitable for this purpose due to their compact size and speed. As the country continues to grow, the demand for HSMVs is increasing. However, to address the issue of climate change, these vehicles must have technological advancements that increase their energy efficiency. One way to achieve this is through trim control, a technique that can reduce the ship's resistance and improve energy efficiency. Studies have shown that if the trim control is properly configured, it can reduce the effects of ship drag and porpoising. However, the speed parameter, hull characteristics, and return moment capacity of the trim control must be properly configured. Because if the design is incorrect, resistance actually rises in comparison to not employing trim control.

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Reynolds Number Dependency of Wall-Bounded Turbulence Over a Surface Partially Covered by Barnacle Clusters

Sarakinos,

Busse

2023

Flow Turbulence Combust

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The settlement of barnacles on a ship hull is a common form of marine biofouling. In this study, the Reynolds number dependency of turbulent flow over a surface partially covered by barnacle clusters is investigated using direct numerical simulations of turbulent channel flow at friction Reynolds numbers ranging from 180 to 720. Mean flow, Reynolds and dispersive stress statistics are evaluated and compared to the corresponding results for a generic irregular rough surface with a Gaussian height distribution. For the barnacle surface, distinctive features emerge in the velocity statistics due to the interplay between the barnacle clusters and the large, connected smooth-wall sections surrounding them. This aspect is further investigated by applying a rough-smooth decomposition to the local time-averaged flow statistics for the barnacle surface. Using this decomposition, the partial recovery of smooth-wall behaviour over the smooth sections of the barnacle surface can be observed in the Reynolds stress statistics with the streamwise Reynolds stresses exhibiting a similar behaviour as previously found for boundary layers over surfaces with a rough to smooth transition.

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Numerical investigation on the effect of homogenous roughness due to biofouling on ship friction resistance

Cited by 3 publications

References 17 publications

Numerical investigations on Hydrofoil Performance due to Homogeneous Roughness

Numerical investigations on Hydrofoil Performance due to Homogeneous Roughness

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Reynolds Number Dependency of Wall-Bounded Turbulence Over a Surface Partially Covered by Barnacle Clusters

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