Memory effects in a turbulent dynamo: Generation and propagation of a large-scale magnetic field / Fedotov S,Ivanov A,Zubarev A // PHYSICAL REVIEW E. - 2002. - V. 65, l. 3, 2B.

ISSN/EISSN:

1539-3755 / нет данных

Type:

Article

Abstract:

We are concerned with large-scale magnetic-field dynamo generation and propagation of magnetic fronts in turbulent electrically conducting fluids. An effective equation for the large-scale magnetic field is developed here that takes into account the finite correlation times of the turbulent flow. This equation involves the memory integrals corresponding to the dynamo source term describing the alpha effect and turbulent transport of magnetic field. We find that the memory effects can drastically change the dynamo growth rate, in particular, nonlocal turbulent transport might increase the growth rate several times compared to the conventional gradient transport expression. Moreover, the integral turbulent transport term leads to a large decrease of the speed of magnetic front propagation.

Author keywords:

SPIRAL GALAXIES; FRONTS; MODELS

DOI:

10.1103/PhysRevE.65.036313

Web of Science ID:

ISI:000174549000013

Соавторы в МНС:

Другие поля

Поле	Значение
Month	MAR
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	036313
Keywords-Plus	SPIRAL GALAXIES; FRONTS; MODELS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Fluids \& Plasmas; Physics, Mathematical
Author-Email	sergei.fedotov@umist.ac.uk Alexey.Ivanov@usu.ru Andrey.Zubarev@usu.ru
ResearcherID-Numbers	Ivanov, Alexey/E-4442-2011 Fedotov, Sergei/H-5880-2012 Zubarev, Adrey/B-4752-2014
ORCID-Numbers	Ivanov, Alexey/0000-0001-8239-4039
Number-of-Cited-References	27
Journal-ISO	Phys. Rev. E
Doc-Delivery-Number	533UP