CFD-Based Numerical Assessment of Antifouling Coating Roughness Influence on Ship Resistance Reduction

Articles in Press

Document Type : Original Article

Authors

1 Naval Architecture and Marine Engineering Department, Faculty of Engineering, Port Said University, Port Said, Egypt

2 portsaid university ,Faculty of engineering,Department of naval architecture and marine engineering

Abstract

Controlling roughness is essential to minimize drag and enhance the long-term performance of marine structures. Numerous studies have investigated various forms of surface roughness through both numerical simulations and experimental approaches, primarily focusing on the flat plate geometries. However, comprehensive data and findings concerning the effects of surface roughness, especially coating roughness on complex three-dimensional (3D) hull structures, such as ships, remain limited and insufficiently explored. In this study, a comprehensive Computational Fluid Dynamics (CFD) analysis is conducted to evaluate the impact of two types of antifouling coatings (foul release (FR) and controlled-depletion polymer (CDP)), each characterized by two levels of surface roughness density, on the hydrodynamic performance of the well-known KRISO Container Ship (KCS) at both model and full scales. Additionally, a comparison is made between the CFD results and the results obtained from previous investigations using Granville’s assumption. The CFD results indicate that the FR coating demonstrates superior performance, resulting in only a 6.75% increase in total drag even at a high level of surface deterioration. Furthermore, Granville’s assumption shows over-predictive results when compared to the CFD results.

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Port-Said Engineering Research Journal

Articles in Press, Accepted Manuscript
Available Online from 26 August 2025

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