Detection of Lagrangian coherent structures in three-dimensional turbulence

  title={Detection of Lagrangian coherent structures in three-dimensional turbulence},
  author={B Green and Clarence W. Rowley and George Haller},
We use direct Lyapunov exponents (DLE) to identify Lagrangian coherent structures in two different three-dimensional flows, including a single isolated hairpin vortex, and a fully developed turbulent flow. These results are compared with commonly used Eulerian criteria for coherent vortices. We find that, despite additional computational cost, the DLE method has several advantages over Eulerian methods, including greater detail and the ability to define structure boundaries without relying on a… CONTINUE READING


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