Vortex Merge Graphs in Two-dimensional Unsteady Flow Fields

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Date
2012
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Volume Title
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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.
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@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
} }
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