Lagrangian coherent structures

SC Shadden - Transport and mixing in laminar flows: from …, 2011 - Wiley Online Library
Mounting evidence suggests that fluid advection can effectively be studied by considering
special material surfaces, which are referred to here as Lagrangian coherent structures …

[图书][B] An introduction to flapping wing aerodynamics

W Shyy, H Aono, C Kang, H Liu - 2013 - books.google.com
This is an ideal book for graduate students and researchers interested in the aerodynamics,
structural dynamics and flight dynamics of small birds, bats and insects, as well as of micro …

A biomimetic jellyfish robot based on ionic polymer metal composite actuators

SW Yeom, IK Oh - Smart materials and structures, 2009 - iopscience.iop.org
A biomimetic jellyfish robot based on ionic polymer metal composite actuators was
fabricated and activated to mimic real locomotive behavior with pulse and recovery …

Oceanic mesoscale eddies as revealed by Lagrangian coherent structures

FJ Beron‐Vera, MJ Olascoaga… - Geophysical Research …, 2008 - Wiley Online Library
We demonstrate the feasibility of using dynamical systems tools to unambiguously identify
mesoscale oceanic eddies from surface ocean currents derived using climatological …

Transport of inertial particles by Lagrangian coherent structures: application to predator–prey interaction in jellyfish feeding

J Peng, JO Dabiri - Journal of Fluid Mechanics, 2009 - cambridge.org
We use a dynamical systems approach to identify coherent structures from often chaotic
motions of inertial particles in open flows. We show that particle Lagrangian coherent …

Fast computation of finite-time Lyapunov exponent fields for unsteady flows

SL Brunton, CW Rowley - Chaos: An Interdisciplinary Journal of …, 2010 - pubs.aip.org
This paper presents new efficient methods for computing finite-time Lyapunov exponent
(FTLE) fields in unsteady flows. The methods approximate the particle flow map, eliminating …

Investigating chaotic wake dynamics past a flapping airfoil and the role of vortex interactions behind the chaotic transition

C Bose, S Sarkar - Physics of fluids, 2018 - pubs.aip.org
The present study investigates the complex vortex interactions in two-dimensional flow-field
behind a symmetric NACA0012 airfoil undergoing a prescribed periodic pitching-plunging …

Reduced-order unsteady aerodynamic models at low Reynolds numbers

SL Brunton, CW Rowley, DR Williams - Journal of Fluid Mechanics, 2013 - cambridge.org
In this paper we develop reduced-order models for the unsteady lift on a pitching and
plunging aerofoil over a range of angles of attack. In particular, we analyse the pitching and …

Invariant-tori-like Lagrangian coherent structures in geophysical flows

FJ Beron-Vera, MJ Olascoaga, MG Brown… - … Journal of Nonlinear …, 2010 - pubs.aip.org
The term “Lagrangian coherent structure”(LCS) is normally used to describe numerically
detected structures whose properties are similar to those of stable and unstable manifolds of …

Finite time lyapunov exponent analysis of model predictive control and reinforcement learning

K Krishna, SL Brunton, Z Song - IEEE Access, 2023 - ieeexplore.ieee.org
Finite-time Lyapunov exponents (FTLEs) provide a powerful approach to compute time-
varying analogs of invariant manifolds in unsteady fluid flow fields. These manifolds are …