Mean electromotive force proportional to mean flow in MILD turbulence
نویسندگان
چکیده
منابع مشابه
Letter to the Editor Mean electromotive force and dynamo action in a turbulent flow
We derive the expression for the mean electromotive force in a turbulent flow taking into account stretching of turbulent magnetic field lines and streamlines by the mean flow. Shear stresses break the symmetry of turbulence in such a way that turbulent motions become suitable for the dynamo action. The contribution of this effect to themean electromotive force is proportional to the production...
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An effect of sheared large-scale motions on a mean electromotive force in a nonrotating turbulent flow of a conducting fluid is studied. It is demonstrated that in a homogeneous divergence-free turbulent flow the alpha effect does not exist, however a mean magnetic field can be generated even in a nonrotating turbulence with an imposed mean velocity shear due to a "shear-current" effect. A mean...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2010
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.200911313