2025
DOI: 10.1615/jflowvisimageproc.2024054391
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High-Resolution Visualization Measurement of Vortex-Shedding at High Frequencies Using Sub-Nyquist-Rate Piv and Compressed Sensing

Yuki Kato

Abstract: Oscillating flows appear in various applications, such as vortex shedding in vehicles, wings, and structures, as well as pulsating flows in pipes. While time-resolved particle image velocimetry (PIV) is often employed for these measurements, high-speed cameras are required to capture high-frequency oscillations, which increases cost and reduces spatial resolution. This study employs a low-speed, high-resolution camera to achieve high-spatial-resolution visualization measurements. Compressed sensing was utilize… Show more

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