Application of the VORTFIND algorithm for the identification of vortical flow features around complex three-dimensional geometries
Article first published online: 27 JUL 2012
Copyright © 2012 John Wiley & Sons, Ltd.
International Journal for Numerical Methods in Fluids
Volume 71, Issue 11, pages 1461–1474, 20 April 2013
How to Cite
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. Int. J. Numer. Meth. Fluids, 71: 1461–1474. doi: 10.1002/fld.3720
- Issue published online: 18 MAR 2013
- Article first published online: 27 JUL 2012
- Manuscript Accepted: 6 JUL 2012
- Manuscript Revised: 18 MAY 2012
- Manuscript Received: 18 JUL 2011
- vortex identification;
- adaptive mesh refinement;
- ship hydrodynamics
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.Copyright © 2012 John Wiley & Sons, Ltd.