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https://hdl.handle.net/2440/132559
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Type: | Journal article |
Title: | Simultaneous imaging of two-phase velocities in particle-laden flows by two-color optical phase discrimination |
Author: | Bi, X. Sun, Z. Lau, T. Alwahabi, Z. Nathan, G.J.G. |
Citation: | Optics Letters, 2021; 46(16/15):3861-3864 |
Publisher: | The Optical Society |
Issue Date: | 2021 |
ISSN: | 0146-9592 1539-4794 |
Statement of Responsibility: | Xiaopeng Bi, Zhiwei Sun, Timothy Lau, Zeyad Alwahabi, and Graham Nathan |
Abstract: | In this Letter,we present a particle image/tracking velocimetry (PIV/PTV) technique for simultaneous velocity measurement of both fluid and particle phases, adopting newly developed optical phase discrimination methods and novel optical particles. Spherical acrylic (PMMA) particles of diameter O.100 m/ were used as the particle phase, while fine BAM V Eu2C phosphors of diameter O.1 m/ were used as the fluid tracer. Under Nd:YAG 355 nm laser excitation, both the laser-induced fluorescence (LIF) from PMMA and laser-induced phosphorescence (LIP) from BAM V Eu2C provided sufficiently strong signals for PIV imaging with two non-intensified cameras and were clearly separable for phase discrimination using spectral filters and temporal profiles. The advantages of the PIV/PTV method include the relatively low cost of BAM V Eu2C phosphors, high sphericity and narrow size distribution of PMMA particles with LIF emission, and direct optical discrimination eliminating artifacts, while requiring much less computational capacity for PIV/PTV processing of complex particle-laden flows. |
Rights: | ©2021 Optical Society of America |
DOI: | 10.1364/ol.428357 |
Grant ID: | http://purl.org/au-research/grants/arc/Discovery DP180102045 |
Published version: | http://dx.doi.org/10.1364/ol.428357 |
Appears in Collections: | Mechanical Engineering publications |
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