| Project/Area Number |
61470056
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
金属精錬・金属化学
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| Research Institution | Nagoya University |
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Principal Investigator |
ASAI Shigeo Faculty of Engneering Nagoya University, 工学部, 助教授 (80023274)
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| Co-Investigator(Kenkyū-buntansha) |
KUWABARA Mamoru Faculty of Engneering Nagoya University, 工学部, 助手 (70023273)
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| Project Period (FY) |
1986 – 1987
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| Project Status |
Completed (Fiscal Year 1987)
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| Budget Amount *help |
¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1987: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1986: ¥4,200,000 (Direct Cost: ¥4,200,000)
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| Keywords | Electromagnetic Metallurgy / Electromagnetic processings of materials / Application of Electromagnetic force / direct rolling / 急速凝固 / 電磁気力の応用 / 双ロール法 / 溶融金属フイルム / フイルム落下挙動 |
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| Research Abstract |
In order to obtain a uniform and stable molten metal film, the shape control function induced by high frequency magnetic field is utilized.
Firstly, the falling behaviour of liquid film shaped by a slit nozzle was observed in a water-model experiment by use of a high speed VTR. The Falling liquid is classified into two regions. Namely, one is denoted as the film flow region appearing in the middle part of the falling liquid and the other as the channel flow region appearing in both sides of the film flow region. The eidth of the film flow region decreased continuously with increase in the falling distance. A mathematical model predicting the falling behaviour of the liquid film is developed on the basis of hydrodynamics and is verified by the water-model experimetn.
Then, the effect of magnetic field on the falling molten-metal film is studied by the mathematical model taking into account the magnetic pressuer induced by magnetic field. Transverse magnetic field imposed on mercury surface mave and damping behavior was measured by making use of laser beam. It was found that the suppression of wave motion did not depend on field intensity but the gradient of it. A dispersion relation of wave motion. is derived from the theoretical analysis taking into account of the gradient of magnetic field, and is verified by the experimental results.
A direct magnetic field imposed virtically to surface of liquid mercury and damping behavior of wave motion was measured by using slit beam. A damping coefficient of wave motion, is derived on the basis of magnetohydrodynamics, and experimental data verifies the theoretical results. Magnetic filed intensity to completely suppress wave motion of molten steel is evaluated by use of the dispersion relation and the damping coefficient derived here.
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