Systematic search for extreme and singular behaviour in some fundamental models of fluid mechanics

B Protas - … Transactions of the Royal Society A, 2022 - royalsocietypublishing.org
This review article offers a survey of the research program focused on a systematic
computational search for extreme and potentially singular behaviour in hydrodynamic …

Towards automated statistical partial discharge source classification using pattern recognition techniques

H Janani, B Kordi - High Voltage, 2018 - Wiley Online Library
This study presents a comprehensive review of the automated classification in partial
discharge (PD) source identification and probabilistic interpretation of the classification …

Bounds for deterministic and stochastic dynamical systems using sum-of-squares optimization

G Fantuzzi, D Goluskin, D Huang… - SIAM Journal on Applied …, 2016 - SIAM
We describe methods for proving upper and lower bounds on infinite-time averages in
deterministic dynamical systems and on stationary expectations in stochastic systems. The …

Bounds on mean energy in the Kuramoto–Sivashinsky equation computed using semidefinite programming

D Goluskin, G Fantuzzi - Nonlinearity, 2019 - iopscience.iop.org
We present methods for bounding infinite-time averages in dynamical systems governed by
nonlinear PDEs. The methods rely on auxiliary functionals, which are similar to Lyapunov …

Bounding extreme events in nonlinear dynamics using convex optimization

G Fantuzzi, D Goluskin - SIAM journal on applied dynamical systems, 2020 - SIAM
We study a convex optimization framework for bounding extreme events in nonlinear
dynamical systems governed by ordinary or partial differential equations (ODEs or PDEs) …

Input-output inspired method for permissible perturbation amplitude of transitional wall-bounded shear flows

C Liu, DF Gayme - Physical Review E, 2020 - APS
The precise set of parameters governing transition to turbulence in wall-bounded shear
flows remains an open question; many theoretical bounds have been obtained, but there is …

Global stability of fluid flows despite transient growth of energy

F Fuentes, D Goluskin, S Chernyshenko - Physical Review Letters, 2022 - APS
Verifying nonlinear stability of a laminar fluid flow against all perturbations is a central
challenge in fluid dynamics. Past results rely on monotonic decrease of a perturbation …

Bounding extrema over global attractors using polynomial optimisation

D Goluskin - Nonlinearity, 2020 - iopscience.iop.org
We present a framework for bounding extreme values of quantities on global attractors of
differential dynamical systems. A global attractor is the minimal set that attracts all bounded …

Finding extremal periodic orbits with polynomial optimization, with application to a nine-mode model of shear flow

MV Lakshmi, G Fantuzzi, JD Fernández-Caballero… - SIAM Journal on Applied …, 2020 - SIAM
Tobasco, Goluskin, and Doering [https://doi. org/10.1016/j. physleta. 2017.12. 023 Phys. Lett.
A, 382 (2018), pp. 382--386}] recently suggested that trajectories of ODE systems that …

A framework for input–output analysis of wall-bounded shear flows

M Ahmadi, G Valmorbida, D Gayme… - Journal of Fluid …, 2019 - cambridge.org
We propose a new framework to evaluate input–output amplification properties of nonlinear
models of wall-bounded shear flows, subject to both square integrable and persistent …