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 …

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 …

Link between subsonic stall and transonic buffet on swept and unswept wings: from global stability analysis to nonlinear dynamics

F Plante, J Dandois, S Beneddine… - Journal of Fluid …, 2021 - cambridge.org
This paper examines the three-dimensional cellular patterns appearing on wings in
subsonic stall and transonic buffet conditions. Unsteady Reynolds-averaged Navier–Stokes …

Unsteady control of supersonic turbulent cavity flow based on resolvent analysis

Q Liu, Y Sun, CA Yeh, LS Ukeiley… - Journal of Fluid …, 2021 - cambridge.org
We use resolvent analysis to develop a physics-based, open-loop, unsteady control strategy
to attenuate pressure fluctuations in turbulent flow over a rectangular cavity with a length-to …

A robust approach for stability analysis of complex flows using high-order Navier-Stokes solvers

R Ranjan, S Unnikrishnan, D Gaitonde - Journal of Computational Physics, 2020 - Elsevier
Global stability modes of flows provide significant insight into their dynamics. Direct methods
to obtain these modes are restricted by the daunting sizes and complexity of Jacobians …

On the influence of the modelling of superhydrophobic surfaces on laminar–turbulent transition

F Picella, JC Robinet, S Cherubini - Journal of Fluid Mechanics, 2020 - cambridge.org
Superhydrophobic surfaces dramatically reduce the skin friction of overlying liquid flows,
providing a lubricating layer of gas bubbles trapped within their surface nano-sculptures …

Bifurcation analysis and frequency prediction in shear-driven cavity flow

Y Bengana, JC Loiseau, JC Robinet… - Journal of Fluid …, 2019 - cambridge.org
A comprehensive study of the two-dimensional incompressible shear-driven flow in an open
square cavity is carried out. Two successive bifurcations lead to two limit cycles with different …

Prediction on steady-oscillatory transition via Hopf bifurcation in a three-dimensional (3D) lid-driven cube

JK Zhang, M Cui, ZL Zuo, SY Luo, JX Guo, ZZ Qiu - Computers & Fluids, 2021 - Elsevier
Massive computations of three-dimensional (3D) flow in subcritical flow state are carried out
to investigate the transition from 3D steady flow to time-periodic oscillatory flow via Hopf …

[HTML][HTML] Acoustic response of turbulent cavity flow using resolvent analysis

Q Liu, D Gaitonde - Physics of Fluids, 2021 - pubs.aip.org
Fluid–acoustic interactions are important in a variety of applications and typically result in
adverse effects. We analyze the influence of Mach number on such interactions and their …

Passive stabilization of crossflow instabilities by a reverse lift-up effect

J Casacuberta, S Hickel, M Kotsonis - Physical Review Fluids, 2024 - APS
A novel mechanism is identified, through which a spanwise-invariant surface feature (a two-
dimensional forward-facing step) significantly stabilizes the stationary crossflow instability of …