As an example of Flow-Induced Vibration (FIV), an interaction between a circular cylinder and a surrounding flow is measured by Digital Holographic Particle Tracking Velocimetry (DH PTV). Tracer particles having two different diameters are dispersed in a cylinder and pipe flow. The cylinder, containing dispersed tracer particles, is made of an acrylic transparent resin and is attached to an inner wall of the pipe. In order to suppress a difference in the refractive index between the cylinder and fluid, the acrylic pipe is filled with a refractive-index-matching liquid having the same refractive index as the cylinder (1.49). The holographic pattern of the tracer particles dispersed in both the cylinder and fluid is measured by digital in-line holography. The three-dimensional position of particles is detected by reconstructed holographic patterns at each time step. Three-dimensional velocity of a surrounding flow and three-dimensional vibration of the cylinder are derived by using a Self-Organizing Map (SOM). Vector fields for the vibrating cylinder and surrounding flow are individually identified from the difference in the particle size detected by digital holography.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4440-3
PROCEEDINGS PAPER
Three-Dimensional Measurement of Interaction Between a Circular Cylinder and Surrounding Flow by Digital Holographic Particle Tracking Velocimetry
Yohsuke Tanaka,
Yohsuke Tanaka
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Search for other works by this author on:
Shigeru Murata
Shigeru Murata
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Search for other works by this author on:
Yohsuke Tanaka
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Shigeru Murata
Kyoto Institute of Technology, Kyoto, Kyoto, Japan
Paper No:
AJK2011-08017, pp. 2169-2174; 6 pages
Published Online:
May 25, 2012
Citation
Tanaka, Y, & Murata, S. "Three-Dimensional Measurement of Interaction Between a Circular Cylinder and Surrounding Flow by Digital Holographic Particle Tracking Velocimetry." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D. Hamamatsu, Japan. July 24–29, 2011. pp. 2169-2174. ASME. https://doi.org/10.1115/AJK2011-08017
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