☆ 4.7 Article

Mean-field dynamo due to spatio-temporal fluctuations of the turbulent kinetic energy

JOURNAL OF FLUID MECHANICS (2023)

Related references

Note: Only part of the references are listed.

Article Astronomy & Astrophysics

Alpha tensor and dynamo excitation in turbulent fluids with anisotropic conductivity fluctuations

Oliver Gressel et al.

Summary: A mean-field theory of the electrodynamics of a turbulent fluid is proposed, where the molecular electric conductivity is correlated with the turbulent velocity fluctuation in the radial direction. It is found that a strong turbulence-induced field advection anti-parallel to the radial direction arises in homogeneous fluids, regardless of rotation. For rotating fluids, an additional alpha effect with the known symmetries and maximum at the poles is observed, except for fast rotation with Coriolis number exceeding unity. Numerical simulations using the nirvana code show that the radial advection velocity dominates over the alpha term. Simplified models demonstrate that alpha(2) dynamos are greatly affected by the radial pumping, leading to oscillatory solutions for gamma < alpha and highly exotic solutions for gamma > alpha, if they exist at all. Ultimately, dynamos based on finite conductivity-velocity correlations may not be effective for alpha(2)omega dynamos without strong shear.

ASTRONOMISCHE NACHRICHTEN (2023)

Add to Collection

Review Multidisciplinary Sciences

Array programming with NumPy

Charles R. Harris et al.

NATURE (2020)

Add to Collection

Article Physics, Fluids & Plasmas

Dynamo theories

Francois Rincon

JOURNAL OF PLASMA PHYSICS (2019)

Add to Collection

Review Astronomy & Astrophysics

The Sun's supergranulation

Francois Rincon et al.

LIVING REVIEWS IN SOLAR PHYSICS (2018)

Add to Collection

Article Astronomy & Astrophysics

The Hottest Hot Jupiters May Host Atmospheric Dynamos

T. M. Rogers et al.

ASTROPHYSICAL JOURNAL LETTERS (2017)

Add to Collection

Article Mechanics

Moffatt-drift-driven large-scale dynamo due to a fluctuations with non-zero correlation times

Nishant K. Singh

JOURNAL OF FLUID MECHANICS (2016)

Add to Collection

Article Physics, Multidisciplinary

Fluctuations of Electrical Conductivity: A New Source for Astrophysical Magnetic Fields

F. Petrelis et al.

PHYSICAL REVIEW LETTERS (2016)

Add to Collection

Article Astronomy & Astrophysics

NUMERICAL STUDIES OF DYNAMO ACTION IN A TURBULENT SHEAR FLOW. I.

Nishant K. Singh et al.

ASTROPHYSICAL JOURNAL (2015)

Add to Collection

Article Astronomy & Astrophysics

Large-scale dynamo action due to α fluctuations in a linear shear flow

S. Sridhar et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2014)

Add to Collection

Review Mechanics

Planetary Magnetic Fields and Fluid Dynamos

Chris A. Jones

ANNUAL REVIEW OF FLUID MECHANICS, VOL 43 (2011)

Add to Collection

Article Astronomy & Astrophysics

TURBULENT DIFFUSION IN THE PHOTOSPHERE AS DERIVED FROM PHOTOSPHERIC BRIGHT POINT MOTION

V. I. Abramenko et al.

ASTROPHYSICAL JOURNAL (2011)

Add to Collection

Article Astronomy & Astrophysics

Electromagnetic induction in non-uniform domains

A. Giesecke et al.

GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS (2010)

Add to Collection

Article Astronomy & Astrophysics

Magnetic diffusivity tensor and dynamo

A. Brandenburg et al.

ASTROPHYSICAL JOURNAL (2008)

Add to Collection

Article Physics, Multidisciplinary

Generation of magnetic field by combined action of turbulence and shear

T. A. Yousef et al.

PHYSICAL REVIEW LETTERS (2008)

Add to Collection

Review Physics, Multidisciplinary

Astrophysical magnetic fields and nonlinear dynamo theory

A Brandenburg et al.

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS (2005)

Add to Collection

Article Astronomy & Astrophysics

The mean electromotive force for MHD turbulence:: The case of a weak mean magnetic field and slow rotation

KH Rädler et al.

GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS (2003)

Add to Collection

© Peeref 2019-2024. All rights reserved.