Analysis of Wake Structures Behind an Oscillating Square Cylinder Using Dynamic Mode Decomposition
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Type of Work22 pages
conference papers and proceedings
Citation of Original PublicationBin Wang and Meilin Yu. "Analysis of Wake Structures Behind an Oscillating Square Cylinder Using Dynamic Mode Decomposition", 46th AIAA Fluid Dynamics Conference, AIAA AVIATION Forum, (AIAA 2016-3779) https://doi.org/10.2514/6.2016-3779
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dynamic mode decomposition algorithm
vortex structures shedding
flow field simulation
flux reconstruction/correction procedure via reconstruction
proper orthogonal decomposition
A dynamic mode decomposition (DMD) algorithm has been used to analyze the vortex structures shedding from an oscillating square cylinder. The flow fields are simulated using a high-order accurate flux reconstruction/correction procedure via reconstruction (FR/CPR) method. The dominant dynamic modes from the wake vortex structures are then extracted from the DMD analysis. Effects of the Strouhal number and Reynolds number on the dynamic modes are studied. Results from DMD are also compared with those from proper orthogonal decomposition (POD). In this study, the capability of the two flow analysis techniques, namely DMD and POD, on capturing dominant vortex structures have been successfully demonstrated. Insights are gained into the flow physics induced by flow structure interaction.