Singularities of the Inertial Flow Map Gradient

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dc.contributor.authorGünther, Tobiasen_US
dc.contributor.authorTheisel, Holgeren_US
dc.contributor.editorMatthias Hullin and Marc Stamminger and Tino Weinkaufen_US
dc.date.accessioned2016-10-10T08:04:18Z
dc.date.available2016-10-10T08:04:18Z
dc.date.issued2016
dc.description.abstractInertial particles are finite-sized objects that are carried by flows, for example sand particles in air. In contrast to massless tracer particles, the trajectories of inertial particles can intersect in space-time. When this occurs, the inertial flow map gradient becomes singular. This has an impact on visualization concepts that require the flow map gradient to be invertible. An example are influence curves, which allow to move inertial particles backward in time and thereby avoid the numerically ill-posed inertial backward integration. In this paper, we show that singularities of the inertial flow map gradient can act as poles for influence curves, i.e., as structures that influence curves cannot cross. Influence curves thereby decay into disconnected pieces. We extract singularities in space-time and propose a simple approach to extract influence curves even when they are spatially disconnected. We demonstrate the extraction techniques and discuss the role of singularities in a number of 2D vector fields.en_US
dc.description.sectionheadersVolumes and Flows
dc.description.seriesinformationVision, Modeling & Visualization
dc.identifier.doi10.2312/vmv.20161344
dc.identifier.isbn978-3-03868-025-3
dc.identifier.issn-
dc.identifier.pages69-76
dc.identifier.urihttps://doi.org/10.2312/vmv.20161344
dc.identifier.urihttps://diglib.eg.org:443/handle/10.2312/vmv20161344
dc.publisherThe Eurographics Associationen_US
dc.subjectI.3.3 [Computer Graphics]
dc.subjectPicture/Image Generation
dc.subjectLine and curve generation
dc.titleSingularities of the Inertial Flow Map Gradienten_US
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