An investigation into the effect of biofouling on the ship hydrodynamic characteristics using CFD

Song, Soonseok and Demirel, Yigit Kemal and Atlar, Mehmet (2019) An investigation into the effect of biofouling on the ship hydrodynamic characteristics using CFD. Ocean Engineering, 175. pp. 122-137. ISSN 0029-8018

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    Abstract

    To reduce the fuel consumption and green-house gas emissions of ships, it is necessary to understand the ship resistance. In this context, understanding the effect of surface roughness on the frictional resistance is of particular importance since the skin friction, which often takes a large portion in ship drag, increases with surface roughness. Although a large number of studies have been carried out since the age of William Froude, understanding the roughness effect is yet challenging due to its unique feature in scaling. In this study, a Computational Fluid Dynamics (CFD) based unsteady Reynolds Averaged Navier-Stokes (RANS) resistance simulation model was developed to predict the effect of barnacle fouling mainly on the resistance and hull wake characteristics of the full-scale KRISO container ship (KCS) hull. Initially, a roughness function model was employed in the wall-function of the CFD software to represent the surface conditions of barnacle fouling. A validation study was carried out involving the model-scale flat plate simulation, and then the same approach was applied in full-scale flat plate simulation and full-scale 3D KCS hull simulation for predicting the effect of barnacle fouling.The increase in frictional resistance due to the different fouling conditions were predictedand compared with the results obtained using the boundary layer similarity law analysis of Granville. Also, a further investigation of the roughness effect on the residuary resistance, viscous pressure resistance and wave making resistance was carried out. Finally, the roughness effect on the wave profile, pressure distribution along the hull, velocity distribution around the hull and wake flows were examined.

    Author(s):Song, Soonseok, Demirel, Yigit Kemal ORCID logoORCID: https://orcid.org/0000-0001-6739-4911 and Atlar, Mehmet
    Item type:Article
    ID code:66895
    Keywords:ship resistance, roughness effect, biofouling, computational fluid dynamics (CFD), full-scale simulation, KRISO Container Ship (KCS), Naval architecture. Shipbuilding. Marine engineering, Ocean Engineering
    Subjects:Naval Science > Naval architecture. Shipbuilding. Marine engineering
    Department:Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering
    Strategic Research Themes > Ocean, Air and Space
    Depositing user: Pure Administrator
    Date deposited:12 Feb 2019 10:59
    Last modified:18 Oct 2019 07:39
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/66895
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