Results 171 to 180 of about 71,920 (208)
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Physical Review Letters, 1986
A resonant fast dynamo is found in chaotic shear flows. The dynamo effect is produced by resonant perturbations of the velocity field, similar to resonant diffusion in plasma physics. The dynamo is called fast because the flow produces an electric field independent of the fluid resistivity.
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A resonant fast dynamo is found in chaotic shear flows. The dynamo effect is produced by resonant perturbations of the velocity field, similar to resonant diffusion in plasma physics. The dynamo is called fast because the flow produces an electric field independent of the fluid resistivity.
openaire +2 more sources
2001
It is widely believed that almost all magnetic fields in a natural environment are a result of the dynamo process—field generation in a moving nearly homogeneous electroconducting fluid of celestial bodies. Such are fields of the Earth, most of the planets, Sun, another stars and even galaxies.
Gailitis, A. +4 more
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It is widely believed that almost all magnetic fields in a natural environment are a result of the dynamo process—field generation in a moving nearly homogeneous electroconducting fluid of celestial bodies. Such are fields of the Earth, most of the planets, Sun, another stars and even galaxies.
Gailitis, A. +4 more
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Geophysical & Astrophysical Fluid Dynamics, 1991
Abstract Recent developments in geodynamo theory have advanced along two distinct tracks. On the one hand, a mean field approach is adopted. With reasonable assumptions about the nature of the α- and ω-effects of mean field theory, axisymmetric dynamo solutions are constructed which include the nonlinear feed back of the Lorentz force on the motion. On
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Abstract Recent developments in geodynamo theory have advanced along two distinct tracks. On the one hand, a mean field approach is adopted. With reasonable assumptions about the nature of the α- and ω-effects of mean field theory, axisymmetric dynamo solutions are constructed which include the nonlinear feed back of the Lorentz force on the motion. On
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Solar Physics, 1985
The basic features of the solar activity mechanism are explained in terms of the dynamo theory of mean magnetic fields. The field generation sources are the differential rotation and the mean helicity of turbulent motions in the convective zone. A nonlinear effect of the magnetic field upon the mean helicity results in stabilizing the amplitude of the ...
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The basic features of the solar activity mechanism are explained in terms of the dynamo theory of mean magnetic fields. The field generation sources are the differential rotation and the mean helicity of turbulent motions in the convective zone. A nonlinear effect of the magnetic field upon the mean helicity results in stabilizing the amplitude of the ...
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Sustaining Earth’s magnetic dynamo
Nature Reviews Earth & Environment, 2022Maylis Landeau +2 more
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