On the Extraction of Long-living Features in Unsteady Fluid Flows
2011 (English)In: Topological Methods in Data Analysis and Visualization: Theory, Algorithms, and Applications / [ed] Valerio Pascucci, Xavier Tricoche, Hans Hagen, Julien Tierny, Springer, 2011, 115-126 p.Chapter in book (Refereed)
This paper proposes aGalilean invariant generalization of critical points ofvector field topology for 2D time-dependent flows. The approach is based upon a Lagrangian consideration of fluid particle motion. It extracts long-living features, likesaddles and centers, and filters out short-living local structures. This is well suited for analysis ofturbulent flow, where standard snapshot topology yields an unmanageable large number of topological structures that are barely related to the few main long-living features employed in conceptual fluid mechanics models. Results are shown for periodic and chaoticvortex motion.
Place, publisher, year, edition, pages
Springer, 2011. 115-126 p.
, Mathematics and Visualization, ISSN 1612-3786 ; 2011
flow visualization, topology
Computer Vision and Robotics (Autonomous Systems)
IdentifiersURN: urn:nbn:se:liu:diva-127684DOI: 10.1007/978-3-642-15014-2ISBN: 978-3-642-15013-5ISBN: 978-3-642-15014-2OAI: oai:DiVA.org:liu-127684DiVA: diva2:926379