TY - GEN
T1 - Tracking coherent structures in massively-separated and turbulent flows
AU - Huang, Yangzi
AU - Rockwood, Matthew
AU - Green, Melissa A.
N1 - Funding Information:
This work was supported by the Air Force Office of ScientificResearchunderAFOSRAwardNo. FA9550-14-
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2015
Y1 - 2015
N2 - Coherent structures are tracked in three simulations of massive-separated or turbulent flow. Topological saddle points are found using intersections of the postiveand negative-time Lagrangian coherent structures, and these points are then followed as the flow evolves in order to track individual structures. In the cases of a 2D flat plate undergoing a 45° pitch-up maneuver and a circular cylinder in cross-flow, tracking saddle points showed a rapid acceleration of the structure as it shed from the plate or cylinder surface. For a simulation of wall-bounded turbulence in a channel flow, tracking the LCS saddle points shows that average structure convection speed exhibits a similar trend as a function of wall-normal distance as the mean velocity profile.
AB - Coherent structures are tracked in three simulations of massive-separated or turbulent flow. Topological saddle points are found using intersections of the postiveand negative-time Lagrangian coherent structures, and these points are then followed as the flow evolves in order to track individual structures. In the cases of a 2D flat plate undergoing a 45° pitch-up maneuver and a circular cylinder in cross-flow, tracking saddle points showed a rapid acceleration of the structure as it shed from the plate or cylinder surface. For a simulation of wall-bounded turbulence in a channel flow, tracking the LCS saddle points shows that average structure convection speed exhibits a similar trend as a function of wall-normal distance as the mean velocity profile.
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M3 - Conference contribution
AN - SCOPUS:85034455747
T3 - 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015
BT - 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015
PB - TSFP-9
T2 - 9th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2015
Y2 - 30 June 2015 through 3 July 2015
ER -