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 Utku Cem Karabulut,Yavuz Hakan Ö,zdemir,et al.Numerical Investigation of the Effect of Surface Roughness on the Viscous Resistance Components of Surface Ships[J].Journal of Marine Science and Application,2022,(3):71-82.[doi:10.1007/s11804-022-00290-x]
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Numerical Investigation of the Effect of Surface Roughness on the Viscous Resistance Components of Surface Ships


Numerical Investigation of the Effect of Surface Roughness on the Viscous Resistance Components of Surface Ships
Utku Cem Karabulut1 Yavuz Hakan Özdemir2 Bar?? Barlas3
Utku Cem Karabulut1 Yavuz Hakan Özdemir2 Bar?? Barlas3
1 Band?rma Onyedi Eylül University, Department of Naval Architecture and Marine Engineering, 10200 Bal?kesir, Turkey;
2 Çanakkale 18 Mart University, Department of Motor Vehicles and Transportation Technologies, 17020 Çanakkale, Turkey;
3 Istanbul Technical University, Department of Naval Architecture and Marine Engineering, 34469 ?stanbul, Turkey
surface roughness|frictional resistance|ship resistance|computational fluid dynamics|RANS
Recently, computational fluid dynamics (CFD) approaches have been effectively used by researchers to calculate the resistance characteristics of ships that have rough outer surfaces. These approaches are mainly based on modifying wall functions using experimentally pre-determined roughness functions. Although several recent studies have shown that CFD can be an effective tool to calculate resistance components of ships for different roughness conditions, most of these studies were performed using the same ship geometry (KRISO Container Ship). Thus, the effect of ship geometry on the resistance characteristics of rough hull surfaces is worth investigating. In this study, viscous resistance components of four different ships are calculated for different roughness conditions. First, flat plate simulations are performed using a previous experimental study for comparison purposes. Then, the viscous resistance components of three-dimensional hulls are calculated. All simulations are performed using two different turbulence models to investigate the effect of the turbulence model on the results. An examination of the distributions of the local skin friction coefficients of the DTMB 5415 and Series 60 showed that the plumpness of the bow form has a significant effect on the increase in frictional resistance with increasing roughness. Another significant finding of the study is that viscous pressure resistance is directly affected by the surface roughness. For all geometries, viscous pressure resistances showed a significant increase for highly rough surfaces.


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Received date:2022-04-25;Accepted date:2022-07-07。
Corresponding author:Utku Cem Karabulut,E-mail:ukarabulut@bandirma.edu.tr
Last Update: 2022-10-09