The Effects of Fouling Control Coatings and Heterogeneous Hull Roughness on Ship Resistance

The Effects of Fouling Control Coatings and Heterogeneous Hull Roughness on Ship Resistance

Hull roughness dramatically increases ship resistance, power, and fuel consumption. Recent studies demonstrate that Computational Fluid Dynamics (CFD) can accurately predict the effect of roughness on the resistance of ships by using a modified wall-function approach. Although hull roughness is often spatially heterogeneous, little research has been carried out on the heterogeneous roughness effect on ship resistance.

Therefore, this research aims to investigate the effect of fouling control coatings and heterogeneous roughness on ship resistance using experiments and CFD. With the support of ARCHIE-WeSt High-Performance Computer (HPC), a series of CFD simulations were conducted on the KRISO Container Ship (KSC) hull in full scale and model scale. Various surface coverage conditions were considered, including homogeneous (i.e. smooth and full-rough conditions) and heterogeneous conditions (i.e. different smooth/rough wetted surface ratios).

Through the definition of a so-called Roughness Impact Factor (RIF), the results of the CFD simulations are showing that different areas of the hull have different impact on the total resistance of the ship. In fact, the bulbous bow and fore parts of the hull impact the hydrodynamics of the ship the most.

For more information about the project contact Prof Osman Turan (o.turan@strath.ac.uk) Professor at the Department of Naval Architecture, Ocean and Marine Engineering at the University of Strathclyde, or Roberto Ravenna (roberto.ravenna@strath.ac.uk), PhD student at the Department of Naval Architecture, Ocean and Marine Engineering at the University of Strathclyde

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