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The impact of slow steaming on ship hydrodynamic characteristics

Nowadays maritime industry is focused on reduction of greenhouse gas (GHG) emissions from shipping. Alt-hough about 2.89 % of the total global anthropogenic CO2 emissions comes from shipping industry, in 2018 the International Maritime Organization (IMO) adopted the strategy to lower the total annual GHG emissions by at least 50 % by 2050, in comparison to 2008. Different measures to mitigate the emissions are proposed and used in the shipping industry, which can be classified into technological and operational measures. The use of alternative fuels and renewable energy sources could be considered as a third category of mitigation measures. One of the short-term operational measures that is being implemented in maritime transport is slow steaming. It is a low- cost measure that can greatly reduce the emissions since fuel consumption depends on the sailing speed. However, it is important to investigate whether the savings in fuel consumption due to lower sailing speed can exceed the costs of a higher number of vessels that have to be engaged to keep the yearly transport work constant. The ship operators would gladly implement this measure if the savings achieved by speed reduction would be greater than the capital and operating costs.

Computational Fluid Dynamics, Reynolds Averaged Navier-Stokes equations, Finite Volume Method, slow steaming, greenhouse gas emissions

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