Global linear instability

V Theofilis - Annual Review of Fluid Mechanics, 2011 - annualreviews.org
This article reviews linear instability analysis of flows over or through complex two-
dimensional (2D) and 3D geometries. In the three decades since it first appeared in the …

Linear instability of low Reynolds number massively separated flow around three NACA airfoils

W He, RS Gioria, JM Pérez, V Theofilis - Journal of Fluid Mechanics, 2017 - cambridge.org
Two-and three-dimensional modal and non-modal instability mechanisms of steady
spanwise-homogeneous laminar separated flow over airfoil profiles, placed at large angles …

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 …

[PDF][PDF] Advances in global instability computations: from incompressible to hypersonic flow

P Paredes - Universidad Politécnica de Madrid: PhD Dissertation, 2014 - core.ac.uk
The present thesis constitutes a step forward in advancing the frontiers of knowledge of fluid
flow instability from a physical point of view, as a consequence of having been successful in …

Self-excited primary and secondary instability of laminar separation bubbles

D Rodriguez, EM Gennaro, LF Souza - Journal of Fluid Mechanics, 2021 - cambridge.org
The self-excited instabilities acting on laminar separation bubbles in the absence of external
forcing are studied by means of linear stability analysis and direct numerical simulation …

On the birth of stall cells on airfoils

D Rodríguez, V Theofilis - Theoretical and Computational Fluid Dynamics, 2011 - Springer
Critical point theory asserts that two-dimensional topologies are defined as degeneracies
and any three-dimensional disturbance of a two-dimensional flow will lead to a new three …

Structural changes of laminar separation bubbles induced by global linear instability

D Rodriguez, V Theofilis - Journal of Fluid Mechanics, 2010 - cambridge.org
The topology of the composite flow fields reconstructed by linear superposition of a two-
dimensional boundary layer flow with an embedded laminar separation bubble and its …

Order 104 speedup in global linear instability analysis using matrix formation

P Paredes, M Hermanns, S Le Clainche… - Computer Methods in …, 2013 - Elsevier
A unified solution framework is presented for one-, two-or three-dimensional complex non-
symmetric eigenvalue problems, respectively governing linear modal instability of …

The two classes of primary modal instability in laminar separation bubbles

D Rodríguez, EM Gennaro, MP Juniper - Journal of Fluid Mechanics, 2013 - cambridge.org
The self-excited global instability mechanisms existing in flat-plate laminar separation
bubbles are studied here, in order to shed light on the causes of unsteadiness and three …

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 …