2011 Fiscal Year Final Research Report
Development of a mixer without impellers as an application of a precessing cavity
| Project/Area Number |
21760130
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | Okayama University (2010-2011)
Kyoto University (2009) |
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Principal Investigator |
GOTO Susumu 岡山大学, 大学院・自然科学研究科, 准教授 (40321616)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 乱流 / 歳差 / 混合 / 撹拌 / 室内実験 / 粒子画像流速測定 / 数値シミュレーション / スペクトル法 |
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| Research Abstract |
The rotational motion of the spin axis of a rotating object is called the "precession". It has been shown that a weak precession of a cavity can lead to strong turbulence of the confined fluid. Aiming to develop a new type of mixer without impellers on the basis of this feature of precession, we have conducted laboratory experiments and numerical simulations of flow in a precessing sphere and in a spheroid. We have then revealed the appropriate combination of control parameters, and the appropriate shape of the cavity to sustain strong turbulence in a precessing cavity.
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