Turbulent boundary layers on rough surfaces with and without a pliable overlayer: A simulation of marine fouling

Lewkowicz, A K; Das, Debendra K.

doi:10.3233/isp-1986-3338601

Cited by 22 publications

(11 citation statements)

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“…The increase in the frictional resistances of surfaces covered with slime was surveyed by Benson et al (1938) who conducted towing tests of flat plates, as well as performing experiments on cylinders and rotating discs; in addition Watanabe et al (1969) used a model ship. Lewkowicz and Das (1986) conducted towing tests of flat plates covered with artificial slime, and the increase in frictional resistance due to the slime was found to be 18% (Schultz and Swain 2000). Loeb et al (1984) conducted rotating disc experiments using discs covered with several different types of microbial slimes.…”

Section: Introductionmentioning

confidence: 99%

Effect of barnacle fouling on ship resistance and powering

et al. 2017

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Predictions of added resistance and the effective power of ships were made for varying barnacle fouling conditions. A series of towing tests was carried out using flat plates covered with artificial barnacles. The tests were designed to allow the examination of the effects of barnacle height and percentage coverage on the resistance and effective power of ships. The drag coefficients and roughness function values were evaluated for the flat plates. The roughness effects of the fouling conditions on the ships' frictional resistances were predicted. Added resistance diagrams were then plotted using these predictions, and powering penalties for these ships were calculated using the diagrams generated. The results indicate that the effect of barnacle size is significant, since a 10% coverage of barnacles each 5 mm in height caused a similar level of added power requirements to a 50% coverage of barnacles each 1.25 mm in height.

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Section: Introductionmentioning

confidence: 99%

Effect of barnacle fouling on ship resistance and powering

et al. 2017

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“…A large number of experimental studies have been devoted to exploring the effect of surface roughness on skin friction over past 120 years, since the very first experimental investigation of the effect of hull roughness on a destroyer conducted by Froude (1872Froude ( , 1874. As stated in Schultz and Swain (2000), there have been numerous studies to explore the adverse effect of marine coatings and biofouling on ship resistance by conducting various types of experimental methods including towing test of flat plates (McEntee, 1915;Benson et al, 1938;Lewkowicz and Das, 1986), rotating disk (Watanabe et al, 1969;Loeb et al, 1984;Candries et al, 2003), flow channel (Candries and Atlar, 2005;Andrewartha et al, 2010) or others (Kempf, 1937;Watanabe et al, 1969). The literature further indicates that the impact of calcareous fouling (e.g.…”

Section: Introductionmentioning

confidence: 99%

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

2019

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To reduce the fuel consumption and greenhouse 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 wallfunction 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 predicted and 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.

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“…In the field of naval architecture, there has been much attention paid to the critical impacts of biofouling on ship resistance and powering [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] as well as the effects on propeller performance [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Penalty of hull and propeller fouling on ship self-propulsion performance

Song

Demirel

Atlar

2020

Applied Ocean Research

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Recently, there has been an increasing interest in predicting the effect of biofouling on ship resistance using Computational Fluid Dynamics (CFD). For a better understanding of the impact of biofouling on the fuel consumption and greenhouse gas emissions of ships, studying the effect of biofouling on ship self-propulsion characteristics is required. In this study, an Unsteady Reynolds Averaged Navier-Stokes (URANS) based fullscale ship self-propulsion model was developed to predict the effect of biofouling on the self-propulsion characteristics of the full-scale KRISO container ship (KCS). A roughness function model was employed in the wall-function of the CFD model to represent the barnacles on the hull, rudder and propeller surfaces. A proportional-integral (PI) controller was embedded in the simulation model to find the self-propulsion point. Simulations were conducted in various configurations of the hull and/or propeller fouling. Finally, the effect of biofouling on the self-propulsion characteristics have been investigated.

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Turbulent boundary layers on rough surfaces with and without a pliable overlayer: A simulation of marine fouling

Cited by 22 publications

References 0 publications

Effect of barnacle fouling on ship resistance and powering

Effect of barnacle fouling on ship resistance and powering

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

Penalty of hull and propeller fouling on ship self-propulsion performance

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