### Abstract

A turbulent dynamo in a conducting fluid is accompanied by the generation of small-scale magnetic fields, which are much stronger than the mean dynamo-generated magnetic field. These small-scale fields modify the α effect in such a way as to stabilize the dynamo process, α= (α_{0}+β_{0}R·▽xR)/(1+R^{2}), where α_{0}, β_{0} are the standard kinematic dynamo parameters, and R is proportional to the mean magnetic field B_{0}, R=B_{0}/(4πρV^{2}/R_{m})^{1/2}, ρ is the fluid density, V is the characteristic turbulent velocity, and R_{m} is the magnetic Reynolds number. The derivation of this formula is illustrated using a simple model - the turbulent dynamo for an asymmetrical top.

Original language | English (US) |
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Pages (from-to) | 1941-1946 |

Number of pages | 6 |

Journal | Physics of Plasmas |

Volume | 2 |

Issue number | 6 |

DOIs | |

State | Published - 1995 |

### ASJC Scopus subject areas

- Condensed Matter Physics

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## Cite this

*Physics of Plasmas*,

*2*(6), 1941-1946. https://doi.org/10.1063/1.871495