Projects per year
Abstract
The problem of predicting a ship's form factor and associated scale effects has been subject to many investigations in recent years. In this study, an attempt is made to investigate whether the form factor is influenced by a change in the ship's speed by numerically modelling a geosim series of the KCS hull with the aid of a RANS solver. The turbulence dependence of the problem is also studied by altering the closure model among three widely used approaches (the k-ω, k-ω SST, and k-ε models). The results show that at very low speeds (Froude numbers in the range of 0.02~0.06) the numerical model predicts changes in the form factor of a ship between 10% and 20%, depending on the turbulence model and scale factor. As the speed is increased further, the form factor exhibits little change, usually in the range of 1% or less. Simulations where the Reynolds number is changed by approximately two orders of magnitude, achieved by altering the value of viscosity, confirmed that the form factor is Froude-dependent only for low speeds, predicting essentially identical values for two high speed cases.
Original language | English |
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Journal | International Journal of Naval Architecture and Ocean Engineering |
Publication status | Accepted/In press - 7 Dec 2020 |
Keywords
- form factor
- ship resistance
- scale effects
- Reynolds number dependence
- Froude number dependence
- turbulence dependence
- RANS
- CFD
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Projects
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Virtual and physical ExperimeNtal Towing centre for the design of eneRgy Efficient sea-faring vessels - VENTuRE (H2020 CSA)
Demirel, Y. K., Atlar, M., Coraddu, A., Day, S., Incecik, A., Kurt, R., Tezdogan, T., Turan, O., Yuan, Z., Song, S. & Terziev, M.
European Commission - Horizon 2020
1/01/20 → 31/12/22
Project: Research
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Shipping in a Changing Climate
Day, S., Incecik, A. & Turan, O.
EPSRC (Engineering and Physical Sciences Research Council)
1/11/13 → 30/04/17
Project: Research
Datasets
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Data for: "Exploring the effects of speed and scale on a ship’s form factor using CFD"
Terziev, M. (Creator), Tezdogan, T. (Creator), Demirel, Y. K. (Creator), Villa, D. (Creator), Mizzi, S. (Creator) & Incecik, A. (Creator), University of Strathclyde, 9 Dec 2020
DOI: 10.15129/177ff072-cd23-4762-9492-2f495a4879d3
Dataset