## Abstract

The role of kinetic helicity in small-scale fast dynamo action is investigated by employing a simple statistical model for the underlying flow with statistics that are Gaussian distributed, temporally delta-correlated and spatially homogeneous and isotropic. In order to focus on small-scale dynamo action we restrict our attention to flows possessing no net kinetic helicity. With the help of a diagrammatic technique and a numerical calculation we show that the dynamo growth rate is independent of the kinetic helicity as the magnetic Reynolds number R_{m} → ∞. It is indicated that the latter enhances the growth of the magnetic energy only for finite R_{m}.

Original language | English |
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Pages (from-to) | 211-218 |

Number of pages | 8 |

Journal | Physics Letters, Section A: General, Atomic and Solid State Physics |

Volume | 236 |

Issue number | 3 |

DOIs | |

Publication status | Published - 8 Dec 1997 |

Externally published | Yes |

## ASJC Scopus subject areas

- Physics and Astronomy(all)