Circular Dynamic Stereoscopy and Its Application for Fluid Measurement

[+] Author and Article Information
Kikuhito Kawasue

Miyazaki University, 1-1 Gakuen Kibanadai Nishi, Miyazaki, 889-2192 Japan

Yuichiro Oya

Japan Fluid Engineering Laboratory, 339-30 Kosasa, Kitamatsuura, Nagasaki 857-0401 Japan

Takakazu Ishimatsu

Nagasaki University, 1-14 Bunkyo, Nagasaki, 852-8521 Japan

J. Fluids Eng 126(1), 42-47 (Feb 19, 2004) (6 pages) doi:10.1115/1.1637632 History: Online February 19, 2004
Copyright © 2004 by ASME
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Velocity distribution within the cylinder tank
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Experimental setup for measurement of a moving surface
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Example images of multiple laser spots on the surface of water: (a) Multiple laser spots; and (b) Multiple laser spots with circular shift.
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Experimental setup using multiple laser spots
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Example images of multiple laser spots: (a) Multiple laser spots projected onto the surfaces of objects; and (b) Image with circular shift.
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Annular streaks showing lines projected from edge normals
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Measurement of the size of an annular streak
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Accumulation of pixel intensities along a streak
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Analysis of spiral streaks
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Examples of the streaks associated with tracer particles: (a) Recorded image; and (b) Analysis result.
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Accuracy of the measurement system
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(a) Particle streaks; (b) Lines in the direction of edge normal; and (c) Estimated center and size of streaks.
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Experimental results of surface measurement of a water wave




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