Pu, Ye and Meng, Hui (2005) Four-dimensional dynamic flow measurement by holographic particle image velocimetry. Applied Optics, 44 (36). pp. 7697-7708. ISSN 0003-6935 http://resolver.caltech.edu/CaltechAUTHORS:PUYao05
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The ultimate goal of holographic particle image velocimetry (HPIV) is to provide space- and time-resolved measurement of complex flows. Recent new understanding of holographic imaging of small particles, pertaining to intrinsic aberration and noise in particular, has enabled us to elucidate fundamental issues in HPIV and implement a new HPIV system. This system is based on our previously reported off-axis HPIV setup, but the design is optimized by incorporating our new insights of holographic particle imaging characteristics. Furthermore, the new system benefits from advanced data processing algorithms and distributed parallel computing technology. Because of its robustness and efficiency, for the first time to our knowledge, the goal of both temporally and spatially resolved flow measurements becomes tangible. We demonstrate its temporal measurement capability by a series of phase-locked dynamic measurements of instantaneous three-dimensional, three-component velocity fields in a highly three-dimensional vortical flow--the flow past a tab.
|Additional Information:||© Copyright 2005 Optical Society of America Received 21 April 2005; revised 7 September 2005; accepted 8 September 2005. The authors thank the National Aeronautics and Space Administration for their support through grant NAG3-2464 and the National Science Foundation for their support through grant CTS-9625307. Valuable contributions from Lujie Cao, Andrew G. Bright, and Scott Woodward to the experiments are greatly appreciated.|
|Subject Keywords:||Holography; Three-dimensional image acquisition; Velocimetry; Scattering, particles|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Archive Administrator|
|Deposited On:||25 May 2006|
|Last Modified:||26 Dec 2012 08:53|
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