Details

Autor(en) / Beteiligte

• Ser-Giacomi, Enrico
• Rodríguez-Méndez, Víctor
• López, Cristóbal
• Hernández-García, Emilio

Titel

Lagrangian Flow Network approach to an open flow model

Ist Teil von

• The European physical journal. ST, Special topics, 2017-06, Vol.226 (9), p.2057-2068

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2017

Link zum Volltext

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• Concepts and tools from network theory, the so-called Lagrangian Flow Network framework, have been successfully used to obtain a coarse-grained description of transport by closed fluid flows. Here we explore the application of this methodology to open chaotic flows, and check it with numerical results for a model open flow, namely a jet with a localized wave perturbation. We find that network nodes with high values of out-degree and of finite-time entropy in the forward-in-time direction identify the location of the chaotic saddle and its stable manifold, whereas nodes with high in-degree and backwards finite-time entropy highlight the location of the saddle and its unstable manifold. The cyclic clustering coefficient, associated to the presence of periodic orbits, takes non-vanishing values at the location of the saddle itself.