We describe a new method for computing coherent Lagrangian vortices in two-dimensional flows according to any of the following approaches: black-hole vortices [24], objective Eulerian Coherent Structures (OECSs) [39], material barriers to diffusive transport [25, 26], and constrained diffusion barriers [26]. The method builds on ideas developed previously in [30], but our implementation alleviates a number of shortcomings and allows for the fully automated detection of such vortices on unprecedentedly challenging real-world flow problems, for which specific human interference is absolutely infeasible. Challenges include very large domains and/or parameter spaces. We demonstrate the efficacy of our method in dealing with such challenges on two test cases: first, a parameter study of a turbulent flow, and second, computing material barriers to diffusive transport in the global ocean.
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DOI: 10.5802/smai-jcm.63
Keywords: Lagrangian coherent structures, coherent vortices, turbulent flows
Daniel Karrasch 1; Nathanael Schilling 1
@article{SMAI-JCM_2020__6__101_0, author = {Daniel Karrasch and Nathanael Schilling}, title = {Fast and robust computation of coherent {Lagrangian} vortices on very large two-dimensional domains}, journal = {The SMAI Journal of computational mathematics}, pages = {101--124}, publisher = {Soci\'et\'e de Math\'ematiques Appliqu\'ees et Industrielles}, volume = {6}, year = {2020}, doi = {10.5802/smai-jcm.63}, mrnumber = {4100533}, zbl = {07207995}, language = {en}, url = {https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.63/} }
TY - JOUR AU - Daniel Karrasch AU - Nathanael Schilling TI - Fast and robust computation of coherent Lagrangian vortices on very large two-dimensional domains JO - The SMAI Journal of computational mathematics PY - 2020 SP - 101 EP - 124 VL - 6 PB - Société de Mathématiques Appliquées et Industrielles UR - https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.63/ DO - 10.5802/smai-jcm.63 LA - en ID - SMAI-JCM_2020__6__101_0 ER -
%0 Journal Article %A Daniel Karrasch %A Nathanael Schilling %T Fast and robust computation of coherent Lagrangian vortices on very large two-dimensional domains %J The SMAI Journal of computational mathematics %D 2020 %P 101-124 %V 6 %I Société de Mathématiques Appliquées et Industrielles %U https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.63/ %R 10.5802/smai-jcm.63 %G en %F SMAI-JCM_2020__6__101_0
Daniel Karrasch; Nathanael Schilling. Fast and robust computation of coherent Lagrangian vortices on very large two-dimensional domains. The SMAI Journal of computational mathematics, Volume 6 (2020), pp. 101-124. doi : 10.5802/smai-jcm.63. https://smai-jcm.centre-mersenne.org/articles/10.5802/smai-jcm.63/
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