Influence of turbulence closure models on the vortical flow field around a submarine body undergoing steady drift
Influence of turbulence closure models on the vortical flow field around a submarine body undergoing steady drift
Manoeuvring underwater vehicles experience complex three-dimensional flow. Features include stagnation and boundary layer separation along a convex surface. The resulting free vortex sheet rolls up to form a pair of streamwise body vortices. The track and strength of the body vortex pair results in a nonlinear increase in lift as body incidence increases. Consequently, accurate capture of the body vortex pair is essential if the flow field around a manoeuvring submarine and the resulting hydrodynamic loading is to be correctly found. This work highlights the importance of both grid convergence and turbulence closure models (TCMs) to the strength and path of the crossflow-induced body vortices experienced by the DOR submarine model at an incidence angle of 15°. Five TCMs are considered; Spalart–Allmaras, k-?, k-?, shear stress transport, and the SSG Reynolds stress model. The SSG Reynolds stress model shows potential improvements in predicting both the path and strength of the body vortex over standard one- and two-equation TCMs based on an eddy viscosity approach
cfd, marine hydrodynamics, vortex identification
201-217
Phillips, A. B.
f565b1da-6881-4e2a-8729-c082b869028f
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Furlong, Maaten
332e9aef-8c6b-452f-8b85-712492767458
September 2010
Phillips, A. B.
f565b1da-6881-4e2a-8729-c082b869028f
Turnock, Stephen R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Furlong, Maaten
332e9aef-8c6b-452f-8b85-712492767458
Phillips, A. B., Turnock, Stephen R. and Furlong, Maaten
(2010)
Influence of turbulence closure models on the vortical flow field around a submarine body undergoing steady drift.
Journal of Marine Science and Technology, 15 (3), .
(doi:10.1007/s00773-010-0090-1).
Abstract
Manoeuvring underwater vehicles experience complex three-dimensional flow. Features include stagnation and boundary layer separation along a convex surface. The resulting free vortex sheet rolls up to form a pair of streamwise body vortices. The track and strength of the body vortex pair results in a nonlinear increase in lift as body incidence increases. Consequently, accurate capture of the body vortex pair is essential if the flow field around a manoeuvring submarine and the resulting hydrodynamic loading is to be correctly found. This work highlights the importance of both grid convergence and turbulence closure models (TCMs) to the strength and path of the crossflow-induced body vortices experienced by the DOR submarine model at an incidence angle of 15°. Five TCMs are considered; Spalart–Allmaras, k-?, k-?, shear stress transport, and the SSG Reynolds stress model. The SSG Reynolds stress model shows potential improvements in predicting both the path and strength of the body vortex over standard one- and two-equation TCMs based on an eddy viscosity approach
Text
DORpaper_review2.pdf
- Author's Original
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Published date: September 2010
Keywords:
cfd, marine hydrodynamics, vortex identification
Organisations:
Ocean Technology and Engineering, Fluid Structure Interactions Group
Identifiers
Local EPrints ID: 178975
URI: http://eprints.soton.ac.uk/id/eprint/178975
ISSN: 0948-4280
PURE UUID: 2d084cb2-c0c4-42d8-8b90-0db84e9f374d
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Date deposited: 08 Apr 2011 10:43
Last modified: 15 Mar 2024 02:39
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Author:
A. B. Phillips
Author:
Maaten Furlong
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