Application of RANS to hydrodynamics of bilge keels and baffles
Application of RANS to hydrodynamics of bilge keels and baffles
This investigation first focuses on modelling the flow around cantilever plates in normal oscillation, providing key guidance for attaining sufficient accuracy for most engineering applications, in terms of turbulence modelling, mesh refinement and time step selection. The modelling approach is then applied to the hydrodynamics of a ship-like section fitted with vertical bilge keels, rolling at free surface. The results obtained from RANS are compared to available experimental data and predictions obtained from potential flow analysis. Viscous effects arising from the presence of the bilge keels are shown to influence more hydrodynamic coefficients than just roll fluid damping. Finally, empirical formulae commonly used to allow for the influence of viscous roll damping are compared to RANS predictions and experimental data.
Querard, A.B.G.
bb00a9a6-d9b0-4eee-ad4b-4f57d0d9927d
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
November 2010
Querard, A.B.G.
bb00a9a6-d9b0-4eee-ad4b-4f57d0d9927d
Temarel, P.
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Querard, A.B.G., Temarel, P. and Turnock, S.R.
(2010)
Application of RANS to hydrodynamics of bilge keels and baffles.
William Froude Conference on Advances in theoretical and applied hydrodynamics – Past and Future, Portsmouth, United Kingdom.
24 - 25 Nov 2010.
Record type:
Conference or Workshop Item
(Paper)
Abstract
This investigation first focuses on modelling the flow around cantilever plates in normal oscillation, providing key guidance for attaining sufficient accuracy for most engineering applications, in terms of turbulence modelling, mesh refinement and time step selection. The modelling approach is then applied to the hydrodynamics of a ship-like section fitted with vertical bilge keels, rolling at free surface. The results obtained from RANS are compared to available experimental data and predictions obtained from potential flow analysis. Viscous effects arising from the presence of the bilge keels are shown to influence more hydrodynamic coefficients than just roll fluid damping. Finally, empirical formulae commonly used to allow for the influence of viscous roll damping are compared to RANS predictions and experimental data.
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Application_of_RANS_to_the_hydrodynamics_of_bilge_keels_and_baffles_QUERARD.docx
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Published date: November 2010
Venue - Dates:
William Froude Conference on Advances in theoretical and applied hydrodynamics – Past and Future, Portsmouth, United Kingdom, 2010-11-24 - 2010-11-25
Organisations:
Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 169617
URI: http://eprints.soton.ac.uk/id/eprint/169617
PURE UUID: ff41736c-cf3e-4b37-aaf0-2d5277695113
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Date deposited: 22 Dec 2010 09:38
Last modified: 14 Mar 2024 02:37
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Author:
A.B.G. Querard
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