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physics.flu-dyn2023
Vorticity Alignment with Lyapunov Vectors and Rate-of-Strain Eigenvectors
Alex Encinas-Bartos, George Haller
We derive asymptotic estimates for the projection of the vorticity onto principal directions of material stretching in 3D flows. In flows with pointwise bounded vorticity, these es…
physics.flu-dyn2023
Relative Fluid Stretching and Rotation for Sparse Trajectory Observations
Nikolas O. Aksamit, Alex P. Encinas-Bartos, George Haller +1
As most mathematically justifiable Lagrangian coherent structure detection methods rely on spatial derivatives, their applicability to sparse trajectory data has been limited. For…