| Project/Area Number |
60580050
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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 |
家政学
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| Research Institution | Tokyogakugei University |
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Principal Investigator |
IWASAKI Yoshie Tokyogakugei University, Professer, 教育学部, 教授 (40014659)
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| Co-Investigator(Kenkyū-buntansha) |
YABE Akihiko The University of the Air, Professer, 教授 (60017217)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1986: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1985: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | Centrifugal Wash / Mechanism of the removal of Particulate Soil / Rotor Angle / Horizontal component / Vertical component / 層流洗淨 |
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| Research Abstract |
(1)OBJECTIVE Estimation of the removal force of model particulate soil in liquid media by ultra-centrifuge and laminar flow has to be persued.
(2)APPROACH AND MAIN RESULTS
A. Approach:Glass and polystyrene particles adhered to a glass plate and polyester, acetate, cellulose films were set in ultra-centrifuge equipped with an angle rotor of which the angle being changed from 15゜to 45゜, and then were removed in various experimental conditions; i.d. washing time, rpm of the centrifuge, and particle size. Laminar flow was also used.
B. Analysis of the Results:Correlation between the removal force Fc(horisonal component Fh and vertical component Fv) vs. particle size has been observed. 1) The removal percentage increased with increasing washing time, and particle size, and were proportional to rpm of centrifuge. 2) The ratio of Fh and Fv were adjusted by changing rotor angle at constant Fc. The removal percentage increased with increasing Fh (i.d. decreasing angle rotor). 3) Comparison of removal percentage given at the same removal force of both methods (cnetrifuge, laminar flow) were shown Table 1.
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