Magnetic Field Generation in Electrically Conducting Fluids

H. K. Moffatt, quot;Magnetic Field Generation in Electrically Conducting Fluidsquot;
Cambridge University Press | 1983 | ISBN: 0521275830 | 353 pages | File type: PDF | 4,5 mb
Understanding of the process of magnetic field generation by self-inductive action in electrically conducting fluids (or ��dynamo theory�� as the subject is commonly called) has advanced dramatically over the last decade. The subject divides naturally into its kinematic and dynamic aspects, neither of which were at all well understood prior to about 1960. The situation has been transformed by the development of the two-scale approach advocated by M. Steenbeck, F. Krause and K.-H. Radler in 1966, an approach that provides essential insights into the effects of fluid motion having either a random ingredient, or a space-periodic ingredient, over which spatial averages may usefully be defined. Largely as a result of this development, the kinematic aspect of dynamo theory is now broadly understood, and recent inroads have been made on the much more difficult dynamic aspects also.

Although a number of specialised reviews have appeared treating dynamo theory in both solar and terrestrial contexts, this monograph provides, I believe, the first self-contained treatment of the subject in book form. I have tried to focus attention on the more fundamental aspects of the subject, and to this end have included in the early chapters a treatment of those basic results of magneto-hydrodynamics that underly the theory. I have also however included two brief chapters concerning the magnetic fields of the Earth and the Sun, and the relevant physical properties of these bodies, and I have made frequent reference in later chapters to specific applications of the theory in terrestrial and solar contexts. Thus, although written from the point of view of a theoretically oriented fluid dynamicist, I hope that the book will be found useful by graduate students and researchers in geophysics and astrophysics, particularly those whose main concern is geomagnetism or solar magnetism.
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