Optimal mode decomposition for unsteady flows

A Wynn, DS Pearson… - Journal of Fluid …, 2013 - cambridge.org
A new method, herein referred to as optimal mode decomposition (OMD), of finding a linear
model to describe the evolution of a fluid flow is presented. The method estimates the linear …

A generalized mean-field model of the natural and high-frequency actuated flow around a high-lift configuration

DM Luchtenburg, B Günther, BR Noack… - Journal of Fluid …, 2009 - cambridge.org
A low-dimensional Galerkin model is proposed for the flow around a high-lift configuration,
describing natural vortex shedding, the high-frequency actuated flow with increased lift and …

Coherent and turbulent process analysis in the flow past a circular cylinder at high Reynolds number

R Perrin, M Braza, E Cid, S Cazin, P Chassaing… - Journal of fluids and …, 2008 - Elsevier
This article presents an experimental study of the turbulent flow past a circular cylinder at
high Reynolds number by means of advanced optical measurements techniques. Following …

Modal decomposition‐based global stability analysis for reduced order modeling of 2D and 3D wake flows

W Stankiewicz, M Morzyński, K Kotecki… - … Methods in Fluids, 2016 - Wiley Online Library
The method for computation of stability modes for two‐and three‐dimensional flows is
presented. The method is based on the dynamic mode decomposition of the data resulting …

On the need of mode interpolation for data-driven Galerkin models of a transient flow around a sphere

W Stankiewicz, M Morzyński, K Kotecki… - … and Computational Fluid …, 2017 - Springer
We present a low-dimensional Galerkin model with state-dependent modes capturing linear
and nonlinear dynamics. Departure point is a direct numerical simulation of the three …

On the need of nonlinear control for efficient model-based wake stabilization

K Aleksić-Roeßner, R King, O Lehmann… - … and Computational Fluid …, 2014 - Springer
The mitigation of oscillatory vortex shedding behind a cylinder is chosen as a well-
investigated benchmark problem to compare model-based feedback flow control …

Genetic algorithm-based calibration of reduced order Galerkin models

W Stankiewicz, R Roszak… - … Modelling and Analysis, 2011 - Taylor & Francis
Low-dimensional models, allowing quick prediction of fluid behaviour, are key enablers of
closed-loop flow control. Reduction of the model's dimension and inconsistency of high …

Galerkin models enhancements for flow control

G Tadmor, O Lehmann, BR Noack… - Reduced-Order Modelling …, 2011 - Springer
Low order Galerkin models were originally introduced as an effective tool for stability
analysis of fixed points and, later, of attractors, in nonlinear distributed systems. An evolving …

Low order Galerkin models for the actuated flow around 2-D airfoils

G Tadmor, M Centuori, O Lehmann, B Noack… - 45th AIAA Aerospace …, 2007 - arc.aiaa.org
The objective of this paper is twofold. One is to explore extensions of the generalized mean-
field empirical Galerkin model, previously developed for wake instabilitiesi to singularly …

Low-power high gain observers for wake flow rebuild

J Ahmed, M Fruchard, E Courtial… - 2020 59th IEEE …, 2020 - ieeexplore.ieee.org
This paper deals with the observation of the wake flow behind a bluff body based on
reduced order models. Two Galerkin models with different truncation orders are considered …