Vortex Tracking and Visualisation in a Flow Past a Tapered Cylinder

dc.contributor.authorReinders, Freeken_US
dc.contributor.authorSadarjoen, I. Arien_US
dc.contributor.authorVrolijk, Benjaminen_US
dc.contributor.authorPost, Frits H.en_US
dc.date.accessioned2015-02-16T07:26:51Z
dc.date.available2015-02-16T07:26:51Z
dc.date.issued2002en_US
dc.description.abstractIn this paper we explore a novel combined application of two of our existing visualisation techniques to thetracking of 3D vortex tubes in an unsteady flow. The applied techniques are the winding-angle vortex extractiontechnique based on streamline geometry, and the attribute-based feature tracking technique. We have applied theseto the well-known case of an unsteady 3D flow past a tapered cylinder.First, 2D vortices are detected in a number of horizontal slices for each time step, by means of the winding-anglevortex extraction method. For each 2D vortex a number of attributes are calculated and stored. These vorticesare visualised by a special type of ellipse icons, showing the position, shape and rotational direction and speed ineach slice.Next, for each time step, 3D vortex tubes are constructed from the 2D vortices by applying the feature trackingprocedure in a spatial dimension to connect the corresponding vortices in adjacent slices. The result is a graphattribute set with the 2D vortex attributes in the nodes and the spatial correspondences as edges.Finally, the 3D vortex tubes are tracked in time using the same tracking procedure, for finding the correspondingtubes in successive time steps. The result is a description of the evolution of the 3D vortices. An interactive, time-dependentvisualisation is generated using the temporal correspondences of each vortex tube. This analysis revealsa number of interesting patterns.ACM CSS: I.3.8 Computer Graphics-Applicationsen_US
dc.description.number4en_US
dc.description.seriesinformationComputer Graphics Forumen_US
dc.description.volume21en_US
dc.identifier.doi10.1111/1467-8659.00625en_US
dc.identifier.issn1467-8659en_US
dc.identifier.pages675-682en_US
dc.identifier.urihttps://doi.org/10.1111/1467-8659.00625en_US
dc.publisherBlackwell Publishers, Inc and the Eurographics Associationen_US
dc.titleVortex Tracking and Visualisation in a Flow Past a Tapered Cylinderen_US
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