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- W2058336660 abstract "Some advancements of the digital mask technique, which was first described by Gui and Merzkirch (1996a ERCOFTAC Bull. 30 45–8) for a phase-separated evaluation of two-phase flow particle image velocimetry (PIV) recordings, are presented in this paper. The originally minimum-quadratic-difference- (MQD-) based mask technique is accelerated by using the fast Fourier transformation algorithm. In order to further increase the evaluation speed and the measurement accuracy, the digital mask technique is modified so that it can be combined with the correlation-based central difference image correction (CDIC) method, which is proved to be a more accurate and less peak-locked evaluation algorithm than both the MQD tracking method and the correlation-based tracking method. An ellipse-shaped interrogation window is constructed with the digital mask technique to improve the spatial resolution of the evaluation without loss of the evaluation accuracy. Applications in PIV measurements of solid/water two-phase flow, bubbly water flow, flow around a human blood cell and airflow near the tip of a vibrating cantilever demonstrate that the combination of the digital mask technique, the CDIC algorithm and the ellipse interrogation window makes a powerful tool for evaluating digital PIV recordings of complex flows." @default.
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- W2058336660 date "2003-09-02" @default.
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- W2058336660 title "Advances and applications of the digital mask technique in particle image velocimetry experiments" @default.
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- W2058336660 doi "https://doi.org/10.1088/0957-0233/14/10/312" @default.
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