FN Archimer Export Format
PT J
TI Galerkin analysis of kinematic dynamos in the von Karman geometry
BT 
AF MARIE, Louis
   NORMAND, C
   DAVIAUD, F
AS 1:1,4;2:2;3:3;
FF 1:;2:;3:;
C1 Service de Physique de l’Etat Condensé, DSM/DRECAM/SPEC, CNRS/SPM URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France and Laboratoire de Physique des Océans, Université de Bretagne Occidentale, BP 809, 29285 Brest, France
   Service de Physique Théorique, CEA/DSM/SPhT, CNRS/SPM URA 2306, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
   Service de Physique de l’Etat Condensé, DSM/DRECAM/SPEC, CNRS/SPM URA 2464, CEA/Saclay, 91191 Gif-sur-Yvette Cedex, France
C2 CNRS, FRANCE
   CEA, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
IN WOS Ifremer jusqu'en 2018
IF 1.697
TC 31
UR https://archimer.ifremer.fr/doc/00253/36474/35014.pdf
LA English
DT Article
AB We investigate dynamo action by solving the kinematic dynamo problem for velocity fields of the von Karman type between two coaxial counter-rotating propellers in a cylinder. A Galerkin method is implemented that takes advantage of the symmetries of the flow and their subsequent influence on the nature of the magnetic field at the dynamo threshold. Distinct modes of instability have been identified that differ by their spatial and temporal behaviors. Our calculations give the result that a stationary and antisymmetric mode prevails at the dynamo threshold. We then present a quantitative analysis of the results based on the parametric study of four interaction coefficients obtained by reduction of our initially large eigenvalue problem. We propose these coefficients to measure the relative importance of the different mechanisms at play in the von Karman kinematic dynamo.
PY 2006
PD JAN
SO Physics Of Fluids
SN 1070-6631
PU Amer Inst Physics
VL 18
IS 1
UT 000235015200025
DI 10.1063/1.2158267
ID 36474
ER

EF