On the mean-field theory of the Karlsruhe dynamo experiment II. Back-reaction of the magnetic field on the fluid flow

2002 ◽  
Vol 38 (1-2) ◽  
pp. 73-94 ◽  
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Fluid Flow ◽  
Mean Field Theory ◽  
Mean Field ◽  
Back Reaction ◽  
The Mean ◽  
The Magnetic Field

Alignment as an Indicator of Changes to Modal Structure within the Roberts Flow

2017 ◽  
Vol 13 (S335) ◽  
pp. 26-28
Author(s):  
Daniel Miller
Keyword(s):  
Magnetic Field ◽  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Velocity Fields ◽  
Dynamo Theory ◽  
Mhd Turbulence ◽  
Modal Structure ◽  
Kinematic Dynamo ◽  
The Magnetic Field

AbstractAlignment of the magnetic and velocity fields has previously been shown to play a role within nonlinear dynamo theory (Cameron and Galloway 2006), MHD turbulence (Matthaeus et al. 1980) and mean field theory (Yokoi 2013). What has not been previously examined is whether it is beneficial to examine alignment within kinematic dynamo theory. I show how measurements of alignment within kinematic dynamo theory for the Roberts flow can indicate a change in the structure of the magnetic field.

scholarly journals Evidence of exactness of the mean-field theory in the nonextensive regime of long-range classical spin models

2000 ◽  
Vol 61 (17) ◽  
pp. 11521-11528 ◽  
Author(s):  
Sergio A. Cannas ◽  
A. C. N. de Magalhães ◽  
Francisco A. Tamarit
Keyword(s):  
Field Theory ◽  
Long Range ◽  
Mean Field Theory ◽  
Mean Field ◽  
Spin Models ◽  
Classical Spin ◽  
The Mean ◽  
Classical Spin Models

scholarly journals Modelling of the Magnetic Configuration of CP Stars from Polarimetric Observations

1998 ◽  
Vol 11 (2) ◽  
pp. 679-681
Author(s):  
M. Landolfi
Keyword(s):  
Magnetic Field ◽  
Stokes Parameter ◽  
Quadratic Field ◽  
Mean Field ◽  
Longitudinal Component ◽  
Stokes Parameters ◽  
Longitudinal Field ◽  
The Mean ◽  
The Magnetic Field ◽  
Polarized Radiation

The observational quantities commonly used to study the magnetic field of CP stars – the mean field modulus and the mean longitudinal field, as well as the ‘mean asymmetry of the longitudinal field’ and the ‘mean quadratic field’ recently introduced by Mathys (1995a,b) – are based either on the Stokes parameter / or on the Stokes parameter V. However, a complete description of polarized radiation requires the knowledge of the full Stokes vector: in other words, we should expect that useful information is also contained in linear polarization (the Stokes parameters Q and U); or rather we should expect the information contained in (Q, U) and in V to be complementary, since linear and circular polarization are basically related to the transverse and the longitudinal component of the magnetic field, respectively.

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