2009 Fiscal Year Final Research Report
Verification and modeling of dynamo effect in magnetohydrodynamic turbulence
| Project/Area Number |
19560159
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
HAMBA Fujihiro The University of Tokyo, 生産技術研究所, 教授 (20251473)
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| Co-Investigator(Renkei-kenkyūsha) |
YOKOI Nobumitsu 東京大学, 生産技術研究所, 助教 (50272513)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 電磁流体 / 乱流 / 乱流モデル / ダイナモ |
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| Research Abstract |
It is known that dynamo mechanism exits which generates and sustains large-scale magnetic field against the turbulent diffusion. In this research a large eddy simulation of magnetohydrodynamic turbulent channel flow was carried out to investigate the dynamo effect. Statistics such as the mean magnetic field and the turbulent energy were evaluated and it was shown that the mean magnetic field is generated. Moreover, the production terms in the transport equation for the turbulent electromotive force were examined to show that the mean field generation is due to the dynamo effect of the cross-helicity (the correlation between the velocity and the magnetic field).
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