On the nonlinear stability of dynamo models
作者:
A. Brandenburg,
I. Tuominen,
D. Moss,
期刊:
Geophysical & Astrophysical Fluid Dynamics
(Taylor Available online 1989)
卷期:
Volume 49,
issue 1-4
页码: 129-141
ISSN:0309-1929
年代: 1989
DOI:10.1080/03091928908243468
出版商: Taylor & Francis Group
关键词: Hydromagnetic dynamos;nonlinear stability
数据来源: Taylor
摘要:
The stability of nonlinear mean-field dynamo models in spherical geometry has been investigated numerically. Assuming axisymmetry and incompressibility we find stable stationary solutions of both even and odd parity over a range of four decades in the Taylor number. Furthermore, we extend studies on solutions with “mixed parity”, which have been found previously for an αω-dynamo model, neglecting here, however, the explicit feedback on the mean motions. Plots of trajectories in phase space and Poincaré maps, showing intersections of the trajectories with certain hyperplanes in phase space, reveal that the solution lies on a torus for some of these models.
点击下载:
PDF (639KB)
返 回