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Ocean Engineering
Volume 191, 2019, 106432

Time-dependent biofouling growth model for predicting the effects of biofouling on ship resistance and powering

Dogancan Uzun, Yigit Kemal Demirel, Andrea Coraddu, Osman Turan

Department of Naval Architecture, Ocean and Marine Engineering, University of Strathclyde, 100 Montrose Street, Glasgow, G4 0LZ, UK.

Abstract

This paper presents a time-dependent biofouling growth model which enables prediction of the effect of biofouling on ship resistance and powering for day-to-day evaluation. Initially, antifouling coating tests data were employed in the model to predict coating performance over time by considering the ship operating profile and shipping route. Based on the equivalent sand roughness heights found in literature, time-dependent biofouling growth predictions were turned into equivalent sand roughness heights. Then, the provided roughness functions for different surface conditions as well as the predicted equivalent sand roughness heights were employed in Granville's similarity law scaling to investigate the effect of roughness on full-scale ship resistance.

Keywords: Time-dependent biofouling, Antifouling coating field tests, Maintenance schedule decision-support tool, Added resistance prediction, Ship operating profile.

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