Non-equilibrium Hydromagnetic Dynamos

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.

Key Features:

• Provides a complete, concise dynamical picture of the hydromagnetic dynamo process generated by non-equilibrium turbulence.
• Emphasizes the role of non-diffusive large-scale dynamo mechanisms
• Provides a possible natural interpretation of the phenomenon of magnetic excursions and reversals in natural systems, such as the Earth, through the non-equilibrium dynamo mechanism, which leads to long-term oscillations of turbulent transport coefficients.
• Emphasizes the existence of a variety of distinct dynamical effects leading to mean-field dynamo in fully developed, strongly nonlinear turbulence.