324 citations · 561 across the 14 of their papers we have counts for
10 papers · 1 filter
An Electroacoustic Lumped Element Model of a Dielectric Elastomer Membrane
C. Solano, Y. Zhang, L. N. Cattafesta
Dielectric elastomers are widely studied for their use in robotic and medical devices due to their shape changing properties. Recently, they have also been incorporated into acoust…
Spectral Analysis Modal Methods (SAMMs) using Non-Time-Resolved PIV
Yang Zhang, Louis N. Cattafesta, Lawrence Ukeiley
We present spectral analysis modal methods (SAMMs) to perform POD in the frequency domain using non-time-resolved Particle Image Velocity (PIV) data combined with unsteady surface…
Unsteady control of supersonic turbulent cavity flow based on resolvent analysis
Qiong Liu, Yiyang Sun, Chi-An Yeh +3
We use resolvent analysis to determine an unsteady active control setup to attenuate pressure fluctuations in turbulent supersonic flow over a rectangular cavity with a length-to-d…
Resolvent analysis of compressible laminar and turbulent cavity flows
Yiyang Sun, Qiong Liu, Louis N. Cattafesta +2
The present work demonstrates the use of resolvent analysis to obtain physical insights for open-cavity flows. Resolvent analysis identifies the flow response to harmonic forcing,…
Active attenuation of a trailing vortex inspired by a parabolized stability analysis
Adam M. Edstrand, Yiyang Sun, Peter J. Schmid +2
Designing effective control for complex three-dimensional flow fields proves to be non-trivial. Oftentimes, intuitive control strategies lead to suboptimal control. To navigate the…
Spanwise effects on instabilities of compressible flow over a long rectangular cavity
Yiyang Sun, Kunihiko Taira, Louis N. Cattafesta +1
The stability properties of two- (2D) and three-dimensional (3D) compressible flows over a rectangular cavity with length-to-depth ratio of is analyzed at a free stream Mac…
Effects of sidewalls and leading-edge blowing on flows over long rectangular cavities
Yiyang Sun, Qiong Liu, Louis N. Cattafesta +2
The present work investigates sidewall effects on the characteristics of three-dimensional (3D) compressible flows over a rectangular cavity with aspect ratios of and $W/D=…
Biglobal instabilities of compressible open-cavity flows
Y. Sun, K. Taira, L. N. Cattafesta +1
The stability characteristics of compressible spanwise-periodic open-cavity flows are investigated with direct numerical simulation and biglobal stability analysis for rectangular…
Cluster-based control of nonlinear dynamics
Eurika Kaiser, Bernd R. Noack, Andreas Spohn +2
The ability to manipulate and control fluid flows is of great importance in many scientific and engineering applications. Here, a cluster-based control framework is proposed to det…
De-Biasing the Dynamic Mode Decomposition for Applied Koopman Spectral Analysis
Maziar S. Hemati, Clarence W. Rowley, Eric A. Deem +1
The Dynamic Mode Decomposition (DMD)---a popular method for performing data-driven Koopman spectral analysis---has gained increased adoption as a technique for extracting dynamical…