Ebook: Small-Scale Structures in Three-Dimensional Hydrodynamic and Magnetohydrodynamic Turbulence: Proceedings of a Workshop Held at Nice, France 10–13 January 1995

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.

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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.
Content:
Front Matter....Pages -
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 Schr?dinger 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
Morphology of the mixing layer in the Rayleigh-Taylor instability....Pages 171-178
Stratified turbulence: Structural issues, and turbulent diffusion....Pages 179-192
Small- and large-scale structures of the decaying turbulence in a continuously stratified liquid....Pages 195-203
On the vertical transport of a passive scalar in a stratified medium....Pages 205-212
Flow field around a circular obstacle emerging from an erosion scour hole....Pages 213-220
New variants to the dynamic Subgrid Scale Model....Pages 221-229
Magnetohydrodynamic turbulence with net currents....Pages 231-237
High Reynolds number vortices with magnetic field in non-axisymmetric strain....Pages 241-254
A model for the distribution of magnetic flux in high beta MHD turbulence....Pages 255-263
Anisotropy in incompressible and compressible 3D MHD turbulence....Pages 265-272
Current sheets in three-dimensional MHD turbulence....Pages 273-279
The role of coherent structures in magnetohydrodynamic turbulence....Pages 281-288
Scale-invariant plasma motions near X-points....Pages 289-294
On the nature of 3D reconnection....Pages 295-300
How does fast reconnection work?....Pages 303-317
Current sheets near magnetic separatrix surfaces....Pages 319-324
Parallel computation of magnetic fluxtube reconnection....Pages 325-330
Fine structure in fast dynamo computations....Pages 331-339
Numerical study of the dynamo effect in a cylinder and the role of small scales....Pages 341-346
A flow-field instability by the hydro-dynamical “alpha-effect”....Pages 347-353
Formation of thin current sheets in magnetospheres....Pages 355-360
Turbulence in the interstellar medium....Pages 363-375
Dynamo generated turbulence in discs....Pages 377-383
Small scales in the solar corona....Pages 385-390
Solar wind turbulence: Comparison of MHD and hybrid simulations....Pages 391-398
Nonlinear dynamics of dispersive Alfv?n waves....Pages 399-404
Large scale circulation induced by small scale surface gravity waves....Pages 405-410
Back Matter....Pages 411-415
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