| Project/Area Number |
16K06066
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Akita University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2017: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 回転円すい / 膜状揚水 / 糸状揚水 / 揚水 / 膜状 / 糸状 / レイリー・テイラー不安定性 / 流れパターンの遷移 / 微粒化 |
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| Outline of Final Research Achievements |
When a cone is immersed in water and rotated, a filmwise flow is pumped up along the outer surface of the cone. In the case of Newtonian fluid that is more viscous than water, filament-wise pumping-up flow appears on the outer surface of the cone due to the effect of spinnability. At this time, the liquid does not scatter despite the centrifugal force acting on the pumped flow on the outer surface of the cone. We investigated the mechanism of successful formation of liquid filament-wise flow from using the transition phenomenon from filmwise pumping to filament-wise pumping. In this study, the generation conditions of the filmwise pumping and the filament-wise pumping were clarified with respect to the change of the rotation speed and the viscosity. Moreover, the value of power required for pumping was clarified.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では、液糸の生成方法について研究を行なった。円すいを回転させる方法を用い、これまでとは異なる製法を用いることで、必要となる消費動力の低減にもつながる可能性を有することを見いだした。このような方法は、コロナ対策で品不足となった不織布マスクを生成することに応用できる。日本の繊維産業が急速なテンポで縮小を余儀なくされきた中で、不織布だけは確実な成長を遂げており、生活に密着した分野から工業分野にいたる幅広い分野の新用途で発展が期待できる。
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