Added mass and damping coefficients for a uniform flexible barge using VOF
Added mass and damping coefficients for a uniform flexible barge using VOF
The main aim of this paper is the numerical investigation of the effect of domain size and mesh density on modeling the three-dimensional (3-D) the radiation problem using RANS CFD software. The solution for the radiation forces and moments, namely the added mass and damping coefficients, is obtained by imposing a simple harmonic oscillation to a marine structure floating in still water at the relevant mode shape. A uniform barge is used to illustrate the investigation, with the relevant symmetric mode shapes provided from the Euler beam theory. The hydrodynamic coefficients for symmetric oscillations of the barge are evaluated using an inviscid flow model in STAR-CCM+. These include the rigid body motions of heave and pitch and the 2- and 3-node distortion mode shapes. A range of mesh densities, between 1.1M and 9.6 M, are used to examine their effects with particular reference to low and high frequencies and the cross-coupling hydrodynamic coefficients between rigid and distortion modes. The influence of the damping zone on the solution is also examined. The RANS CFD predictions are compared with the results from a three-dimensional potential flow boundary element method, allowing for hull distortions.
International Conference on Hydrodynamics
Kim, J.H.
449c77b0-dc96-425b-8fad-4b5e214fa93f
Lakshmynarayanana, Puramharikrishnnan
b6bde7ae-aa54-4c07-89ee-83687b85fbfa
Temarel, Pandeli
b641fc50-5c8e-4540-8820-ae6779b4b0cf
19 October 2014
Kim, J.H.
449c77b0-dc96-425b-8fad-4b5e214fa93f
Lakshmynarayanana, Puramharikrishnnan
b6bde7ae-aa54-4c07-89ee-83687b85fbfa
Temarel, Pandeli
b641fc50-5c8e-4540-8820-ae6779b4b0cf
Kim, J.H., Lakshmynarayanana, Puramharikrishnnan and Temarel, Pandeli
(2014)
Added mass and damping coefficients for a uniform flexible barge using VOF.
In Proceedings of the 11th International Conference on Hydrodynamics (ICHD 2014).
International Conference on Hydrodynamics.
8 pp
.
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Conference or Workshop Item
(Paper)
Abstract
The main aim of this paper is the numerical investigation of the effect of domain size and mesh density on modeling the three-dimensional (3-D) the radiation problem using RANS CFD software. The solution for the radiation forces and moments, namely the added mass and damping coefficients, is obtained by imposing a simple harmonic oscillation to a marine structure floating in still water at the relevant mode shape. A uniform barge is used to illustrate the investigation, with the relevant symmetric mode shapes provided from the Euler beam theory. The hydrodynamic coefficients for symmetric oscillations of the barge are evaluated using an inviscid flow model in STAR-CCM+. These include the rigid body motions of heave and pitch and the 2- and 3-node distortion mode shapes. A range of mesh densities, between 1.1M and 9.6 M, are used to examine their effects with particular reference to low and high frequencies and the cross-coupling hydrodynamic coefficients between rigid and distortion modes. The influence of the damping zone on the solution is also examined. The RANS CFD predictions are compared with the results from a three-dimensional potential flow boundary element method, allowing for hull distortions.
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Published date: 19 October 2014
Venue - Dates:
11th International Conference on Hydrodynamics (ICHD 2014), Singapore, Singapore, 2014-10-19 - 2014-10-24
Organisations:
Fluid Structure Interactions Group
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Local EPrints ID: 382659
URI: http://eprints.soton.ac.uk/id/eprint/382659
PURE UUID: 5b27b76b-4d8c-4338-a9f7-83169bdc5a5b
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Date deposited: 23 Oct 2015 15:29
Last modified: 16 Mar 2024 02:45
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J.H. Kim
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