DMCA
Bifurcation Phenomena and Dynamo Effect in Electrically Conducting Fluids
BibTeX
@MISC{Feudel_bifurcationphenomena,
author = {F. Feudel and S. Rüdiger and N. Seehafer},
title = {Bifurcation Phenomena and Dynamo Effect in Electrically Conducting Fluids},
year = {}
}
Share
 |
 |
 |
 |
||
OpenURL
Abstract
Electrically conducting uids in motion can act as self-excited dynamos. The magnetic fields of celestial bodies like the Earth and the Sun are generated by such dynamos. Their theory aims at modeling and understanding both the kinematic and dynamic aspects of the underlying processes. Kinematic dynamo models, in which for a prescribed ow the linear induction equation is solved and growth rates of the magnetic field are calculated, have been studied for many decades. But in order to get consistent models and to take into account the back-reaction of the magnetic field on the fluid motion, the full nonlinear system of the magnetohydrodynamic (MHD) equations has to be studied. It is generally accepted that these equations, i.e. the Navier-Stokes equation (NSE) and the induction equation, provide a theoretical basis for the explanation of the dynamo effect. The general idea is that mechanical energy pumped into the fluid by heating or other mechanisms is transferred to the magnetic field by n...
Keyphrases
magnetic field dynamo effect electrically conducting fluid bifurcation phenomenon self-excited dynamo full nonlinear system induction equation celestial body linear induction equation mechanical energy underlying process dynamic aspect fluid motion consistent model many decade theory aim general idea kinematic dynamo model navier-stokes equation theoretical basis growth rate
