| Project/Area Number |
01550143
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Gifu University (1990)
Nagoya University (1989) |
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Principal Investigator |
YAMASHITA Shintaro Gifu Univ., Faculty of Eng., Associate Prof., 工学部, 助教授 (20023236)
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| Co-Investigator(Kenkyū-buntansha) |
KUSHIDA Takehiro Nagoya Univ., Faculty of Eng., Research Associate, 工学部, 助手 (90109281)
NIIMI Tomohide Nagoya Univ., Faculty of Eng., Associate Prof., 工学部, 助教授 (70164522)
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| Project Period (FY) |
1989 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1990: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1989: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Photochromism / Fluid Measurement / Photochromic Dye / Laser / Time Line / Flow Visualization / CCD Camera / Picture Processing |
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| Research Abstract |
In this research, fundamental experiments for application of photochromism to fluid measurements and flow visualization are carried out. Following results are obtained.
(1) Absorbance of photochromic dyes; Absorbance, which depends on wave length of irradiated light, of 5 photochromic dyes of spiropyrans is investigated. The photochromic dyes are dissolved in ethanol. It is found that 1, 3, 3-trimethylindolino-6'-nitrobenzopyrylospiran has much larger absorbance in the ultra violet region than the other dyes. Therefore, this dye is very suitable for fluid measurements and flow visualization.
(2) Length and density of dye trace For use of photochromism in fluid measurements and flow visualization, it is necessary that the most suitable density of dye and power of the laser are selected. The excimer laser beam (operated by XeCl, wave length = 308 nm) is used to form a dye trace. The dye is dissolved in ethanol. Length and thickness of the dye trace, depending on the density of dye (0.04-0.00075 weight %), are measured by a CCD camera. It is found that the length of the dye trace is longer for low density of dye than for high density. The optimum condition of density of dye is proposed for fluid measurements and flow visualization.
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