324 citations · 561 across the 14 of their papers we have counts for
14 papers
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…
Stereoscopic molecular tagging for superconducting accelerator-cavity quench spot detection
Shiran Bao, Toshiaki Kanai, Yang Zhang +2
Superconducting radio-frequency (SRF) cavities cooled by superfluid helium-4 (He II) are building blocks of many modern particle accelerators due to their high quality factor. Howe…
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…
A cryogenic-helium pipe flow facility with unique double-line molecular tagging velocimetry capability
Hamid Sanavandi, Shiran Bao, Yang Zhang +3
Cryogenic helium-4 has extremely small kinetic viscosity, which makes it a promising material for high Reynolds () number turbulence research in compact laboratory apparatuses.…
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=…
Evaluating the accuracy of the dynamic mode decomposition
Hao Zhang, Scott T. M. Dawson, Clarence W. Rowley +2
Dynamic mode decomposition (DMD) gives a practical means of extracting dynamic information from data, in the form of spatial modes and their associated frequencies and growth/decay…
Online dynamic mode decomposition for time-varying systems
Hao Zhang, Clarence W. Rowley, Eric A. Deem +1
Dynamic mode decomposition (DMD) is a popular technique for modal decomposition, flow analysis, and reduced-order modeling. In situations where a system is time varying, one would…
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…