Background oriented schlieren technique with fast Fourier demodulation for measuring large density-gradient fields of fluids
Takaaki Shimazaki,
Sayaka Ichihara,
Yoshiyuki Tagawa
Abstract:In order to measure the large density-gradient fields of fluids such as underwater shock waves, we employed a fast Fourier demodulation called Fast Checkerboard Demodulation (FCD) method in Background Oriented Schlieren (BOS) technique. BOS is a simple image-based measurement technique that detects the apparent displacement (local distortion) of a background image caused by the density gradient of the fluid in front of the background. The cross-correlation particle image velocimetry (PIV) method, which is comm… Show more
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