Small-Scale Structures in Three-Dimensional Hydrodynamic and Magnetohydrodynamic Turbulence: Proceedings of a Workshop Held at Nice, France, 10-13 January 1995 (Lecture Notes in Physics)

Small-scale Structures In Turbulent Flows Appear As A Subtle Mixture Of Order And Chaos That Could Play An Important Role In The Energetics. The Aim Here Is A Better Understanding Of The Similarities And Differences Between Vortex And Current Dynamics, And Of The Influence Of These Structures On The Statistical And Transport Properties Of Hydrodynamic And Magnetohydrodynamic Turbulence, With Special Concern For Fusion Plasmas, And Solar Or Magnetospheric Environments. Special Emphasis Is Given To The Intermittency At Inertial Scales And To The Coherent Structures At Small Scales. Magnetic Reconnection And The Dynamo Effect Are Also Discussed, Together With The Effect Of Stratification And Inhomogeneity. The Impact Of Hydrodynamic Concepts On Astro And Geophysical Observations Are Reviewed. From The Contents: Turbulent Flows -- Structures In Hydrodynamic Turbulence -- Intermittency -- Stratified And Inhomogeneous Flows -- Structures In Mhd Flows -- Magnetic Reconnection And Dynamo -- Astro- And Geophysical Flows. Maurice Meneguzzi, Annick Pouquet, Pierre-louis Sulem (eds.) Includes Bibliographical References. Small-scale behavior in distorted turbulent boundary layers at high Reynolds number....Pages 3-8 Vortex stretching and enstrophy generation in numerical and laboratory turbulence....Pages 9-16 The role of singularities in Euler....Pages 17-23 On a possible Euler singularity during transition in a high-symmetry flow....Pages 25-32 Vortex dynamics in numerical simulations of transitional and turbulent shear flows....Pages 33-44 Turbulent mixing: small-scale properties....Pages 45-50 Compressible flows and vortex stretching....Pages 51-58 Vortex models of the fine scales of turbulence....Pages 61-74 Development of turbulence in a confined elliptic vortex....Pages 75-82 Axial dynamics of viscous vortices....Pages 83-88 Influence of the low pressure filaments on the velocity statistics in a turbulent shear flow....Pages 89-97 Geometric and topological aspects of vortex filament dynamics under LIA....Pages 99-104 Nonlinear Schrödinger Equation: An hydrodynamical tool?....Pages 105-112 Inertial-range intermittency....Pages 115-122 Statistics of small-scale structures and a dynamical mechanism of cascade....Pages 123-130 New results on turbulence in helium....Pages 131-136 Structures in turbulence and multifractal universality....Pages 137-144 Scaling laws of two-dimensional turbulence....Pages 145-151 Scaling laws in the Solar Wind turbulence....Pages 153-158 Multiplicative cascade models and multifractality....Pages 159-164 Turbulent jets: Reichardt's inductive theory and intermittency corrections....Pages 165-170 Transverse and longitudinal scaling laws in homogeneous and non-homogeneous low Re γ turbulence....Pages 171-178 Morphology of the mixing layer in the Rayleigh-Taylor instability....Pages 179-192 Stratified turbulence: Structural issues, and turbulent diffusion....Pages 195-203 Small- and large-scale structures of the decaying turbulence in a continuously stratified liquid....Pages 205-212 On the vertical transport of a passive scalar in a stratified medium....Pages 213-220 Flow field around a circular obstacle emerging from an erosion scour hole....Pages 221-229 New variants to the dynamic Subgrid Scale Model....Pages 231-237 Magnetohydrodynamic turbulence with net currents....Pages 241-254 High Reynolds number vortices with magnetic field in non-axisymmetric strain....Pages 255-263 A model for the distribution of magnetic flux in high beta MHD turbulence....Pages 265-272 Anisotropy in incompressible and compressible 3D MHD turbulence....Pages 273-279 Current sheets in three-dimensional MHD turbulence....Pages 281-288 The role of coherent structures in magnetohydrodynamic turbulence....Pages 289-294 Scale-invariant plasma motions near X-points....Pages 295-300 On the nature of 3D reconnection....Pages 303-317 How does fast reconnection work?....Pages 319-324 Current sheets near magnetic separatrix surfaces....Pages 325-330 Parallel computation of magnetic fluxtube reconnection....Pages 331-339 Fine structure in fast dynamo computations....Pages 341-346 Numerical study of the dynamo effect in a cylinder and the role of small scales....Pages 347-353 A flow-field instability by the hydro-dynamical “alpha-effect”....Pages 355-360 Formation of thin current sheets in magnetospheres....Pages 363-375 Turbulence in the interstellar medium....Pages 377-383 Dynamo generated turbulence in discs....Pages 385-390 Small scales in the solar corona....Pages 391-398 Solar wind turbulence: Comparison of MHD and hybrid simulations....Pages 399-404 Nonlinear dynamics of dispersive Alfvén waves....Pages 405-410 Large scale circulation induced by small scale surface gravity waves....Pages 411-415 Small-scale structures in turbulent flows appear as a subtle mixture of order and chaos that could play an important role in energetics. This book aims to provide a better understanding of the similarities and differences between vortex and current dynamics.