TY - JOUR
T1 - Turbulent dynamos and magnetic helicity
AU - Ji, Hantao
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999/10/18
Y1 - 1999/10/18
N2 - It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999
AB - It is shown that the turbulent-dynamo α effect converts magnetic helicity from the turbulent field to the mean field when the turbulence is electromagnetic, while the magnetic helicity of the mean field is transported across space when the turbulence is electrostatic or due to the electron diamagnetic effect. In all cases, however, the dynamo effect strictly conserves the total helicity except for resistive effects and a small battery effect. Implications for astrophysical situations, especially for the solar dynamo, are discussed. 1999
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U2 - 10.1103/PhysRevLett.83.3198
DO - 10.1103/PhysRevLett.83.3198
M3 - Article
AN - SCOPUS:0001567009
VL - 83
SP - 3198
EP - 3201
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 16
ER -