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This book is a collection of lectures given in July 2007 at the Les Houches Summer School on ""Dynamos"". Provides a pedagogical introduction to topics in Dynamos Addresses each topic from the basis to the most recent developments Covers the lectures by internationally-renowned and leading experts

Magnetohydrodynamics --- Dynamo theory (Cosmic physics) --- Astrophysics --- Geophysics

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"Global magnetic fields in planets, in the Sun and other stars, in spiral glazies and galaxy clusters are believed to be generated and maintained by a hydromagnetic dynamo, a process that converts turbulent kinetic energy into magnetic energy. These dynamo processes operate on drastically different scales, but are associated with common physical mechanisms, involving a complex interaction of rotation, turbulence, and instabilities. The goal of IAU Symposium 294 was to discuss the most important results of recent studies of the cosmic dynamo processes, from planets to stars, galaxies, and clusters of galaxies. This volume covers advances in dynamo theories and numerical simulations, links between dynamos and turbulence, the origin of magnetic fields, and current and future observational projects. The proceedings of IAU S294 are an important asset for advanced students and researchers, as a summary of the hot topics related to the solar and astrophysical dynamos and magnetic activity."--Back cover.

Cosmic magnetic fields --- Dynamo theory (Cosmic physics)

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Cosmic magnetic fields --- Dynamo theory (Cosmic physics) --- Congresses

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Electromagnetism. Ferromagnetism --- Dynamo theory (Cosmic physics) --- 533.9 --- #KVIV --- Astrophysics --- Geophysics --- Magnetohydrodynamics --- Plasma physics --- Dynamo theory (Cosmic physics). --- 533.9 Plasma physics

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This book reviews and synthesizes recent findings concerning the dynamo effect of beating waves in a turbulent wave field and non-stationary dynamo effect associated with history of evolution of turbulent kinetic and cross helicities. The latter one is based on coexistence of the kinetic and cross helicities in plasma turbulence. Moreover, the physical picture of the non-equilibrium dynamo effect brings in a possible natural interpretation of the phenomenon of magnetic excursions and reversals in natural systems such as the Earth's core, as described in chapter 3. The most important aim of this book is to explain and emphasize the versatile role of non-equilibrium effects in turbulent hydromagnetic dynamos, hitherto typically neglected.

Magnetohydrodynamics. --- Dynamo theory (Cosmic physics) --- Fluid dynamics. --- Fluid mechanics. --- SCIENCE / Mechanics / Hydrodynamics.