Magneto-Fluid Dynamics
Fundamentals and Case Studies of Natural Phenomena
Buch in deiner Nähe kaufen
Beschreibung
This book concerns the generation of electric currents and of electric space charges inside conducting media that move in magnetic fields.
The authors postulate nothing but the Maxwell equations. They discuss at length the disk dynamo, which serves as a model for the natural self-excited dynamos that generate magnetic fields such as that of sunspots.
There are 36 Examples and 13 Case Studies. The Case Studies concern solar phenomena -- magnetic elements, sunspots, spicules, coronal loops -- and the Earth's magnetic field.
Magnetohydrodynamics (MHD) concerns the interaction between magnetic fields and conducting fluids. We are concerned here with macroscopic inter actions and, when the conducting fluid is a plasma, time scales are very much longer than the plasma period. Plasma periods vary widely, but are short, say 10~^^ second. We prefer the term Magneto-F/i^Z(i-Dynamics (MFD) because the disci pline concerns mostly plasmas, various liquid conductors, and the liquid part of the Earth's core. It seems that the only applications of MFD to water are the induction of electric currents in the oceans by the Earth's magnetic field, and ship propulsion. But even MFD is not quite appropriate because that term also includes solid conductors that move in magnetic fields. This book is meant for graduate and upper-division undergraduate stu dents in Physics, Geophysics, and Astrophysics, as well as for practicing sci entists in these fields. This book is no more than a brief introduction to MFD because this vast subject is closely related to many others, namely Astrophysics, Elec trodynamics, Fluid Dynamics, Geophysics, Oceanography, Plasma Physics, Thermonuclear Fusion, etc. We sketch the fundamentals, and provide many Examples, as well as Case Studies related to natural phenomena. MFD sorely needs a rethink: it must of course be totally compatible with Physics. On the contrary, it is the custom to discuss the shapes of imaginary magnetic field lines, without ever referring to the required electric currents.
Provides an understanding of the physics at work in sunspots and solar coronal loops This book provides a new approach to Magneto-Fluid-Dynamics (or Magneto-Hydro-Dynamics), mainly in two different ways Contrary to the usual custom of discussing imaginary magnetic field lines, the book focuses on the electric currents that are induced in conductors that move in magnetic fields
Autor*in
Paul Lorrain
Themen in »Magneto-Fluid Dynamics«
CERN Case Dynamics Fluid Magneto Fluid Dynamics Magneto Hydro Dynamics Maxwell's equations electric current magnetic field physics today plasma physics solar physics
Stimmen zu »Magneto-Fluid Dynamics«
From the reviews:
“This text is an interesting, and clearly structured introduction to dynamo theory inspired from the study of natural dynamos, particularly within the solar environment. It provides an enticing flavour of the modelling of a wide variety of electromagnetic phenomena. … The text is intended primarily for advanced undergraduates and postgraduates in physics, geophysics and astrophysics. … The essentially independent case studies make this book ideal to dip in and out of and to use as a source of reference on magneto-fluid phenomena … .” (Anne Juel, Contemporary Physics, Vol. 51 (1), 2010)
()