Inspecting Lagrangian coherent structures in turbulent combustion simulations


Type
Conference Object
Change log
Authors
Nair, V 
Nastac, G 
Ihme, Matthias 
Abstract

In this study, fnite time Lyapunov exponent (FTLE) fields from turbulent reacting flows are evaluated. The unsteady turbulent velocity field is obtained from large-eddy simulations, and reacting (DLR Flame A) and non-reacting unconfined jet configurations are considered. Backward FTLE analysis on the velocity field is performed, and the anal- ysis shows that the ridges approximate the flow structure associated with the organized fuid structure. To examine the merit of this method in identifying coherent structures, we compare the results with the well-known Q-criterion.

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Journal Title
Conference Name
Center for Turbulence Research Proceedings of the Summer Program
Journal ISSN
Volume Title
Publisher
Sponsorship
Royal Academy of Engineering (RAEng)