Application of the VORTFIND algorithm for the identification of vortical flow features around complex three-dimensional geometries
Application of the VORTFIND algorithm for the identification of vortical flow features around complex three-dimensional geometries
Accurate prediction of the hydrodynamic forces and moments acting on a manoeuvring marine vehicle using Reynolds averaged Navier–Stokes simulations requires sufficient mesh resolution to capture off-body vortical structures. Because the path of these structures is not known a priori, a vortex identification and capture strategy is required alongside an iterative mesh adaption process. An improved version of the VORTFIND algorithm, which can identify multiple vortices of variable strength and rotational direction using a K-means algorithm is described. The algorithm is applied to velocity fields generated from Reynolds averaged Navier–Stokes simulations to increase the mesh resolution in the vortex core region, ensuring sufficient mesh density to capture the downstream propagation of the vortex for a submarine hull at drift and ship propeller–rudder interaction
1461-1474
Phillips, A.B.
f565b1da-6881-4e2a-8729-c082b869028f
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
April 2013
Phillips, A.B.
f565b1da-6881-4e2a-8729-c082b869028f
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Phillips, A.B. and Turnock, S.R.
(2013)
Application of the VORTFIND algorithm for the identification of vortical flow features around complex three-dimensional geometries.
International Journal for Numerical Methods in Fluids, 71 (11), .
(doi:10.1002/fld.3720).
Abstract
Accurate prediction of the hydrodynamic forces and moments acting on a manoeuvring marine vehicle using Reynolds averaged Navier–Stokes simulations requires sufficient mesh resolution to capture off-body vortical structures. Because the path of these structures is not known a priori, a vortex identification and capture strategy is required alongside an iterative mesh adaption process. An improved version of the VORTFIND algorithm, which can identify multiple vortices of variable strength and rotational direction using a K-means algorithm is described. The algorithm is applied to velocity fields generated from Reynolds averaged Navier–Stokes simulations to increase the mesh resolution in the vortex core region, ensuring sufficient mesh density to capture the downstream propagation of the vortex for a submarine hull at drift and ship propeller–rudder interaction
Text
VortfindPaperV5.pdf
- Author's Original
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Published date: April 2013
Organisations:
National Oceanography Centre, Fluid Structure Interactions Group
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Local EPrints ID: 341997
URI: http://eprints.soton.ac.uk/id/eprint/341997
ISSN: 0271-2091
PURE UUID: 8f4bb3ef-547f-4526-a0a6-145327a79894
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Date deposited: 09 Aug 2012 11:28
Last modified: 15 Mar 2024 03:21
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Author:
A.B. Phillips
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