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Supercriticality to subcriticality in dynamo transitions
Supercriticality to subcriticality dynamo transitions Fluid Dynamics
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2012/4/20
In this paper, we present a three-mode dynamo model which describes both supercritical and subcritical dynamo transitions. The nature of dynamo transition changes from supercritical to subcritical as ...
A dynamo driven by zonal jets at the upper surface: applications to giant planets
giant planets upper surface
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2011/9/1
We present a dynamo mechanism arising from the presence of barotropically unstable zonal jet currents in a spherical shell. The shear instability of the zonal flow develops in the form of a global Ros...
Nonlinear quenching of current fluctuations in a self-exciting homopolar dynamo
Nonlinear quenching current fluctuations self-exciting homopolar dynamo
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2009/11/13
In the interpretation of geomagnetic polarity reversals with their highly variable frequency over geological time it is necessary, as with other irregularly fluctuating geophysical phenomena, to consi...
A theory of the Earth's magnetic field and of sunspots,based on a self-excited dynamo incorporating the Hall effect
Earth's magnetic field self-excited dynamo Hall effect
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2009/11/12
A new viewpoint on the generation and maintenance of the Earth's magnetic field is put forward, which integrates self-exciting dynamo theory with the possibility of energy coupling along orthogonal ax...
On the mean-field theory of the Karlsruhe Dynamo Experiment
Dynamo geodynamo dynamo experiment mean-field dynamo theory a-effect
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2009/11/12
In the Forschungszentrum Karlsruhe an experiment has been constructed which demonstrates a homogeneous dynamo as is expected to exist in the Earth's interior. This experiment is discussed within the f...
The Karlsruhe Dynamo Experiment
Karlsruhe Dynamo Experiment homogeneous dynamos
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2009/11/12
It has been shown theoretically in the past that homogeneous dynamos may occur in electrically conducting fluids for various vortical velocity fields. Roberts (1972) investigated spatially periodic, i...
Direct numerical simulations of helical dynamo action:MHD and beyond
Direct numerical simulations helical dynamo action MHD and beyond
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2009/11/11
Magnetohydrodynamic dynamo action is often invoked to explain the existence of magnetic fields in several astronomical objects. In this work, we present direct numerical simulations of MHD helical dyn...
Finite amplitudes helical waves on the surface of the conducting fluid earth core as an example of the self-exciting homopolar heterogeneous dynamo
Finite amplitudes helical waves conducting fluid earth self-exciting homopolar heterogeneous dynamo
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2009/11/9
Helical waves of the finite amplitude on a surface of the fluid conducting Earth core are examined for generation of the magnetic field. Estimates are made for the differentially rotating cylindrical ...
A multi-layered kinematic dynamo model: implications of a stratified upper layer in the Earths core
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2007/7/28
专著信息
书名
A multi-layered kinematic dynamo model: implications of a stratified upper layer in the Earth's core
语种
英文
撰写或编译
作者
Liao X.,Zhang K.,D. Gubbins
第一作者单位
出版社
Geophys. Astrophys. Fluid Dyn., 2005,...
A Sandwich interface dynamo: linear dynamo waves in the Sun
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2007/7/28
专著信息
书名
A Sandwich interface dynamo: linear dynamo waves in the Sun
语种
英文
撰写或编译
作者
Zhang K.,Liao X.,Schubert G
第一作者单位
出版社
Astrophys. J. 2004, 602:468-480
出版地
出版日期
2004年
月
日
标准书号
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