| Project/Area Number |
62550124
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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 | Tokyo Institute of Technology |
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Principal Investigator |
YAMANE Ryuichro Tokyo Institute of Technology, Engineering, Professor, 工学部, 教授 (50016424)
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| Co-Investigator(Kenkyū-buntansha) |
OSHIMA Shuzo Tokyo Institute of Technology, Engineering, Research Associate, 工学部, 助手 (20143670)
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| Project Period (FY) |
1987 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1989: ¥100,000 (Direct Cost: ¥100,000)
Fiscal Year 1988: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1987: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Fluid Mechanics / Magnetic Fluid / Laser velocimeter / Optical Fiber / Traveling Magnetic Field / Laser Diode Source / 流体光学 / レーザ流速計 / レーザ変位計 / 回転磁場 / 界面現象 / スロッシング |
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| Research Abstract |
On the flow of magnetic fluid in a traveling magnetic field, the following new results were obtained: It was very difficult to measure the inner velocity distribution of magnetic fluid flows with a normal typed laser-doppler velocimeter, because magnetic fluid is so black and opaque liquid that scattered light can hardly pass through it. However, directed strong light of proper wavelength can pass through it in only a short distance. So we developed the new method to measure the local velocity of magnetic fluid flow, using a AlGaAs laser diode optical source. The wavelength of laser light was about 800nm. In this method, the local velocity of magnetic was obtained by measuring the time taken for a tracer particle to pass between two sets of fibers. After this method was adjusted with the rotational flow in a rotational flow in a rotating channel, it was applied to the flow of a magnetic fluid in a circular channel excited by a traveling magnetic field made by a stator of a single-sided linear induction motor. From the measurements, the induced velocity was found to be proportional to the frequency and the strength of the applied current to the inductor. It was important to choose the size of tracer particles, the wavelength of the light source and the sensitive optical detector for the better results.
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