Vortex Merge Graphs in Two-dimensional Unsteady Flow Fields
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Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
The Eurographics Association
Abstract
Among the various existing vortex definitions, there is one class that relies on extremal structures of derived scalar fields. These are, e.g., vorticity,λ<sub>2</sub>, or the acceleration magnitude. This paper proposes a method to identify and track extremal-based vortex structures in 2D time-dependent flows. It is based on combinatorial scalar field topology. In contrast to previous methods, merge events are explicitly handled and represented in the resulting graph. An abstract representation of this vortex merge graph serves as basis for the comparison of the different scalar identifiers. The method is applied to numerically simulated flows of a mixing layer and a planar jet.
Description
@inproceedings{10.2312:PE/EuroVisShort/EuroVisShort2012/001-005,
booktitle = {EuroVis - Short Papers},
editor = {Miriah Meyer and Tino Weinkaufs},
title = {{Vortex Merge Graphs in Two-dimensional Unsteady Flow Fields}},
author = {Kasten, Jens and Hotz, Ingrid and Noack, Bernd and Hege, Hans-Christian},
year = {2012},
publisher = {The Eurographics Association},
ISBN = {978-3-905673-91-3},
DOI = {10.2312/PE/EuroVisShort/EuroVisShort2012/001-005}
}