Abstract
| Language | English |
|---|---|
| Pages | 122-137 |
| Number of pages | 16 |
| Journal | Ocean Engineering |
| Volume | 175 |
| Early online date | 15 Feb 2019 |
| DOIs | |
| Publication status | Published - 1 Mar 2019 |
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Keywords
- ship resistance
- roughness effect
- biofouling
- computational fluid dynamics (CFD)
- full-scale simulation
- KRISO Container Ship (KCS)
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An investigation into the effect of biofouling on the ship hydrodynamic characteristics using CFD. / Song, Soonseok; Demirel, Yigit Kemal; Atlar, Mehmet.
In: Ocean Engineering, Vol. 175, 01.03.2019, p. 122-137.Research output: Contribution to journal › Article
TY - JOUR
T1 - An investigation into the effect of biofouling on the ship hydrodynamic characteristics using CFD
AU - Song, Soonseok
AU - Demirel, Yigit Kemal
AU - Atlar, Mehmet
PY - 2019/3/1
Y1 - 2019/3/1
N2 - 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.
AB - 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.
KW - ship resistance
KW - roughness effect
KW - biofouling
KW - computational fluid dynamics (CFD)
KW - full-scale simulation
KW - KRISO Container Ship (KCS)
UR - https://www.sciencedirect.com/journal/ocean-engineering
U2 - 10.1016/j.oceaneng.2019.01.056
DO - 10.1016/j.oceaneng.2019.01.056
M3 - Article
VL - 175
SP - 122
EP - 137
JO - Ocean Engineering
T2 - Ocean Engineering
JF - Ocean Engineering
SN - 0029-8018
ER -