Parallel vectors criteria for unsteady flow vortices

Feature-based flow visualization is naturally dependent on feature extraction. To extract flow features, often higher-order properties of the flow data are used such as the Jacobian or curvature properties, implicitly describing the flow features in terms of their inherent flow characteristics (e.g....

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Veröffentlicht in:IEEE transactions on visualization and computer graphics. - 1996. - 14(2008), 3 vom: 21. Mai, Seite 615-26
1. Verfasser: Fuchs, Raphael (VerfasserIn)
Weitere Verfasser: Peikert, Ronald, Hauser, Helwig, Sadlo, Filip, Muigg, Philipp
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2008
Zugriff auf das übergeordnete Werk:IEEE transactions on visualization and computer graphics
Schlagworte:Evaluation Study Journal Article Research Support, Non-U.S. Gov't
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245 1 0 |a Parallel vectors criteria for unsteady flow vortices 
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520 |a Feature-based flow visualization is naturally dependent on feature extraction. To extract flow features, often higher-order properties of the flow data are used such as the Jacobian or curvature properties, implicitly describing the flow features in terms of their inherent flow characteristics (e.g., collinear flow and vorticity vectors). In this paper we present recent research which leads to the (not really surprising) conclusion that feature extraction algorithms need to be extended to a time-dependent analysis framework (in terms of time derivatives) when dealing with unsteady flow data. Accordingly, we present two extensions of the parallel vectors based vortex extraction criteria to the time-dependent domain and show the improvements of feature-based flow visualization in comparison to the steady versions of this extraction algorithm both in the context of a high-resolution dataset, i.e., a simulation specifically designed to evaluate our new approach, as well as for a real-world dataset from a concrete application 
650 4 |a Evaluation Study 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
700 1 |a Peikert, Ronald  |e verfasserin  |4 aut 
700 1 |a Hauser, Helwig  |e verfasserin  |4 aut 
700 1 |a Sadlo, Filip  |e verfasserin  |4 aut 
700 1 |a Muigg, Philipp  |e verfasserin  |4 aut 
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