Model order reduction methods for geometrically nonlinear structures: a review of nonlinear techniques

C Touzé, A Vizzaccaro, O Thomas - Nonlinear Dynamics, 2021 - Springer
This paper aims at reviewing nonlinear methods for model order reduction in structures with
geometric nonlinearity, with a special emphasis on the techniques based on invariant …

Constrained sparse Galerkin regression

JC Loiseau, SL Brunton - Journal of Fluid Mechanics, 2018 - cambridge.org
The sparse identification of nonlinear dynamics (SINDy) is a recently proposed data-driven
modelling framework that uses sparse regression techniques to identify nonlinear low-order …

How to compute invariant manifolds and their reduced dynamics in high-dimensional finite element models

S Jain, G Haller - Nonlinear dynamics, 2022 - Springer
Invariant manifolds are important constructs for the quantitative and qualitative
understanding of nonlinear phenomena in dynamical systems. In nonlinear damped …

Krylov methods for large-scale dynamical systems: Application in fluid dynamics

RAS Frantz, JC Loiseau… - Applied …, 2023 - asmedigitalcollection.asme.org
In fluid dynamics, predicting and characterizing bifurcations, from the onset of unsteadiness
to the transition to turbulence, is of critical importance for both academic and industrial …

Dimensionally consistent learning with Buckingham Pi

J Bakarji, J Callaham, SL Brunton… - Nature Computational …, 2022 - nature.com
In the absence of governing equations, dimensional analysis is a robust technique for
extracting insights and finding symmetries in physical systems. Given measurement …

Physics-constrained, low-dimensional models for magnetohydrodynamics: First-principles and data-driven approaches

AA Kaptanoglu, KD Morgan, CJ Hansen, SL Brunton - Physical Review E, 2021 - APS
Plasmas are highly nonlinear and multiscale, motivating a hierarchy of models to
understand and describe their behavior. However, there is a scarcity of plasma models of …

On the role of nonlinear correlations in reduced-order modelling

JL Callaham, SL Brunton, JC Loiseau - Journal of Fluid Mechanics, 2022 - cambridge.org
This work investigates nonlinear dimensionality reduction as a means of improving the
accuracy and stability of reduced-order models of advection-dominated flows. Nonlinear …

Numerical simulations of flow past three circular cylinders in equilateral-triangular arrangements

W Chen, C Ji, MM Alam, J Williams… - Journal of Fluid …, 2020 - cambridge.org
Flow past three identical circular cylinders is numerically investigated using the immersed
boundary method. The cylinders are arranged in an equilateral-triangle configuration with …

Dynamics-based machine learning of transitions in Couette flow

B Kaszás, M Cenedese, G Haller - Physical Review Fluids, 2022 - APS
We derive low-dimensional, data-driven models for transitions among exact coherent states
in one of the most studied canonical shear flows, the plane Couette flow. These one-or two …

Bifurcation scenario in the two-dimensional laminar flow past a rotating cylinder

J Sierra, D Fabre, V Citro, F Giannetti - Journal of Fluid Mechanics, 2020 - cambridge.org
The aim of this paper is to provide a complete description of the bifurcation scenario of a
uniform flow past a rotating circular cylinder up to. Linear stability theory is used to depict the …