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Filtering of FTLE for Visualizing Spatial Separation in Unsteady 3D Flow

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dc.contributor.author Pobitzer, Armin
dc.contributor.author Peikert, Ronald
dc.contributor.author Fuchs, Raphael
dc.contributor.author Theisel, Holger
dc.contributor.author Hauser, Helwig
dc.date.accessioned 2012-06-22T12:13:52Z
dc.date.available 2012-06-22T12:13:52Z
dc.date.issued 2012
dc.identifier.citation Topological Methods in Data Analysis and Visualization II: 237-253 en
dc.identifier.uri http://dx.doi.org/10.1007/978-3-642-23175-9_16
dc.identifier.uri http://hdl.handle.net/1956/5860
dc.description.abstract In many cases, feature detection for flow visualization is structured in two phases: first candidate identification, and then filtering. With this paper, we propose to use the directional information contained in the finite-time Lyapunov exponents (FTLE) computation, in order to filter the FTLE field. In this way we focus on those separation structures that delineate flow compartments which develop into different spatial locations, as compared to those that separate parallel flows of different speed. We provide a discussion of the underlying theory and our related considerations. We derive a new filtering scheme and demonstrate its effect in the context of several selected fluid flow cases, especially in comparison with unfiltered FTLE visualization. Since previous work has provided insight with respect to the studied flow patterns, we are able to provide a discussion of the resulting visible separation structures. en
dc.language.iso eng en
dc.publisher Springer en
dc.relation.ispartof <a href="http://hdl.handle.net/1956/5856" target="blank">Interactive Visual Analysis of Time-dependent Flows: Physics- and Statistics-based Semantics</a>
dc.rights Copyright Springer-Verlag. All rights reserved. en
dc.title Filtering of FTLE for Visualizing Spatial Separation in Unsteady 3D Flow en
dc.type Peer reviewed en
dc.type Journal article en
dc.subject.nsi VDP::Mathematics and natural science: 400::Information and communication science: 420::Simulation, visualization, signal processing, image processing: 429 en
dc.type.version updatedVersion en


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