Elementary vortices - those tubular swirling vortical structures with concentrated vorticity commonly observed in various kinds of turbulent flows - play key roles in turbulence dynamics (e.g. enhancement of mixing, diffusion and resistance) and characterize turbulence statistics (e.g. intermittency). Because of their dynamical importance, manipulation of elementary vortices is expected to be effective and useful in turbulence control as well as in construction of turbulence modeling. The most advanced research works on elementary vortices and related problems were presented and discussed at…mehr
Elementary vortices - those tubular swirling vortical structures with concentrated vorticity commonly observed in various kinds of turbulent flows - play key roles in turbulence dynamics (e.g. enhancement of mixing, diffusion and resistance) and characterize turbulence statistics (e.g. intermittency). Because of their dynamical importance, manipulation of elementary vortices is expected to be effective and useful in turbulence control as well as in construction of turbulence modeling. The most advanced research works on elementary vortices and related problems were presented and discussed at the IUTAM Symposium in Kyoto, Japan, 26-28 October 2004. This book contains 40 contributions presented there, the subjects of which cover vortex dynamics, coherent structures, chaotic advection and mixing, statistical properties of turbulence, rotating and stratified turbulence, instability and transition, dynamics of thin vortices, finite-time singularity, and superfluid turbulence. The book should be useful for readers of graduate and advanced levels in the field of fluid turbulence.
Vortex dynamics.- CLUSTERING OF INTENSE STRUCTURES IN ISOTROPIC TURBULENCE: NUMERICAL AND EXPERIMENTAL EVIDENCE.- MULTI MODES FOR THE VORTEX SHEET-TUBE TRANSFORMATION PROCESS AND VISCOELASTIC EFFECT.- DYNAMICS OF SMALL-SCALE VORTICITY AND STRAIN-RATE STRUCTURES IN THE TRANSITION FROM ISOTROPIC TO SHEAR TURBULENCE.- INTERACTION BETWEEN A COLUMNAR VORTEX AND EXTERNAL TURBULENCE.- VORTEX STRUCTURES IN A ROUGH-WALL CHANNEL FLOWAND THEIR INFLUENCE ON PASSIVE SCALAR.- Coherent structures.- THE NEAR-WALL STRUCTURES OF TURBULENT WALL FLOWS.- COHERENT FINE SCALE EDDIES IN THE LOGARITHMIC REGION OF TURBULENT CHANNEL FLOWS.- ON THE POSSIBLE EXISTENCE OF A CO-SUPPORTING CYCLE OF LARGE-SCALE AND NEAR-WALL STRUCTURES IN WALL TURBULENCE.- PERIODIC MOTION IN HIGH-SYMMETRIC FLOW.- VORTEX TUBES IN VELOCITY FIELDS OF LABORATORY TURBULENCE AT HIGH REYNOLDS NUMBERS.- LOCAL VORTEX IDENTIFICATION CRITERIA: INTER-RELATIONSHIPS AND A UNIFIED OUTLOOK.- Chaotic advection and mixing.- PERSISTENT MULTIPLE-SCALE STAGNATION POINT STRUCTURE.- STREAMLINES, COHERENT VORTICES AND PAIR DIFFUSION IN TWO-DIMENSIONAL TURBULENCE.- SELF-SIMILARITY OF BALLISTICALLY SEPARATING MOTIONS IN TURBULENT RELATIVE DISPERSION.- TWO-PARTICLE DIFFUSION AND FINE-SCALE STRUCTURES OF TURBULENCE.- FLOWDUE TO A POINT VORTEX IN AN OSCILLATING AND ROTATING STRAINING FLOW.- Statistical properties of turbulence.- STATISTICAL PROPERTY OF PRESSURE FLUCTUATION IN FULLY DEVELOPED TURBULENCE.- INTERMITTENCY, FIELD STRUCTURES AND ACCURACY OF DNS IN A PASSIVE SCALAR TURBULENCE.- SELF-SIMILARITY OF VORTICITY DYNAMICS IN DECAYING TWO-DIMENSIONAL TURBULENCE.- A GRID-FREE REDISTRIBUTION MODEL FOR A VORTEX METHOD AND TURBULENT FLOW ANALYSIS.- Rotating and stratified turbulence.- A NEW TWIST TO ROTATING STRATIFIED TURBULENCE.- ENERGY CASCADE PROCESSES IN STRATIFIED TURBULENCE.- ASYMMETRIZATION OF JET PROFILES IN ?-PLANE TURBULENCE.- DYNAMICS OF VELOCITY FIELD IN DEVELOPED THERMAL TURBULENCE.- INSTABILITY OF CO-ROTATING VERTICAL VORTICES IN A STRATIFIED FLUID.- ACTION OF COHERENT VORTICES IN ROTATING DUCT FLOWS.- Instability and transition.- INSTABILITY OF LOW-SPEED STREAKS LEADING TOWALL TURBULENCE.- THE TURBULENT ENERGY CASCADE BUILT BY A VORTEX BURST.- MIXING TRANSITION IN SUPERSONIC STREAMWISE VORTICES.- EVOLUTION OF VORTEX STRUCTURES IN A MODEL OF THE TURBULENT TRAILING VORTEX.- HELICAL MODES IN SWIRLING JETS.- Dynamics of thin vortices.- MOTION OF THREE-DIMENSIONAL VORTEX FILAMENT AND PARTICLE TRANSPORT.- LINEAR AND NONLINEAR INSTABILITY OF A VORTEX RING.- MOTION OF UNSTABLE POLYGONAL RING OF VORTEX POINTS ON SPHERE WITH POLE VORTICES.- Finite-time singularity.- INVARIANTS, DIFFUSION AND TOPOLOGICAL CHANGE IN INCOMPRESSIBLE NAVIER-STOKES EQUATIONS.- EVOLUTION OF COMPLEX SINGULARITIES AND KOLMOGOROV SCALING IN TRUNCATED THREE-DIMENSIONAL EULER FLOWS.- HELICITY GENERATION IN THREEDIMENSIONAL EULER AND TURBULENCE.- Superfluid turbulence.- SUPERFLUID TURBULENCE AND DYNAMICS OF QUANTIZED VORTICES.- DECAY OF QUANTUM TURBULENCE BY KELVINWAVE CASCADE.- FLOW PHASE DIAGRAM FOR THE HELIUM SUPERFLUIDS.
Vortex dynamics.- CLUSTERING OF INTENSE STRUCTURES IN ISOTROPIC TURBULENCE: NUMERICAL AND EXPERIMENTAL EVIDENCE.- MULTI MODES FOR THE VORTEX SHEET-TUBE TRANSFORMATION PROCESS AND VISCOELASTIC EFFECT.- DYNAMICS OF SMALL-SCALE VORTICITY AND STRAIN-RATE STRUCTURES IN THE TRANSITION FROM ISOTROPIC TO SHEAR TURBULENCE.- INTERACTION BETWEEN A COLUMNAR VORTEX AND EXTERNAL TURBULENCE.- VORTEX STRUCTURES IN A ROUGH-WALL CHANNEL FLOWAND THEIR INFLUENCE ON PASSIVE SCALAR.- Coherent structures.- THE NEAR-WALL STRUCTURES OF TURBULENT WALL FLOWS.- COHERENT FINE SCALE EDDIES IN THE LOGARITHMIC REGION OF TURBULENT CHANNEL FLOWS.- ON THE POSSIBLE EXISTENCE OF A CO-SUPPORTING CYCLE OF LARGE-SCALE AND NEAR-WALL STRUCTURES IN WALL TURBULENCE.- PERIODIC MOTION IN HIGH-SYMMETRIC FLOW.- VORTEX TUBES IN VELOCITY FIELDS OF LABORATORY TURBULENCE AT HIGH REYNOLDS NUMBERS.- LOCAL VORTEX IDENTIFICATION CRITERIA: INTER-RELATIONSHIPS AND A UNIFIED OUTLOOK.- Chaotic advection and mixing.- PERSISTENT MULTIPLE-SCALE STAGNATION POINT STRUCTURE.- STREAMLINES, COHERENT VORTICES AND PAIR DIFFUSION IN TWO-DIMENSIONAL TURBULENCE.- SELF-SIMILARITY OF BALLISTICALLY SEPARATING MOTIONS IN TURBULENT RELATIVE DISPERSION.- TWO-PARTICLE DIFFUSION AND FINE-SCALE STRUCTURES OF TURBULENCE.- FLOWDUE TO A POINT VORTEX IN AN OSCILLATING AND ROTATING STRAINING FLOW.- Statistical properties of turbulence.- STATISTICAL PROPERTY OF PRESSURE FLUCTUATION IN FULLY DEVELOPED TURBULENCE.- INTERMITTENCY, FIELD STRUCTURES AND ACCURACY OF DNS IN A PASSIVE SCALAR TURBULENCE.- SELF-SIMILARITY OF VORTICITY DYNAMICS IN DECAYING TWO-DIMENSIONAL TURBULENCE.- A GRID-FREE REDISTRIBUTION MODEL FOR A VORTEX METHOD AND TURBULENT FLOW ANALYSIS.- Rotating and stratified turbulence.- A NEW TWIST TO ROTATING STRATIFIED TURBULENCE.- ENERGY CASCADE PROCESSES IN STRATIFIED TURBULENCE.- ASYMMETRIZATION OF JET PROFILES IN ?-PLANE TURBULENCE.- DYNAMICS OF VELOCITY FIELD IN DEVELOPED THERMAL TURBULENCE.- INSTABILITY OF CO-ROTATING VERTICAL VORTICES IN A STRATIFIED FLUID.- ACTION OF COHERENT VORTICES IN ROTATING DUCT FLOWS.- Instability and transition.- INSTABILITY OF LOW-SPEED STREAKS LEADING TOWALL TURBULENCE.- THE TURBULENT ENERGY CASCADE BUILT BY A VORTEX BURST.- MIXING TRANSITION IN SUPERSONIC STREAMWISE VORTICES.- EVOLUTION OF VORTEX STRUCTURES IN A MODEL OF THE TURBULENT TRAILING VORTEX.- HELICAL MODES IN SWIRLING JETS.- Dynamics of thin vortices.- MOTION OF THREE-DIMENSIONAL VORTEX FILAMENT AND PARTICLE TRANSPORT.- LINEAR AND NONLINEAR INSTABILITY OF A VORTEX RING.- MOTION OF UNSTABLE POLYGONAL RING OF VORTEX POINTS ON SPHERE WITH POLE VORTICES.- Finite-time singularity.- INVARIANTS, DIFFUSION AND TOPOLOGICAL CHANGE IN INCOMPRESSIBLE NAVIER-STOKES EQUATIONS.- EVOLUTION OF COMPLEX SINGULARITIES AND KOLMOGOROV SCALING IN TRUNCATED THREE-DIMENSIONAL EULER FLOWS.- HELICITY GENERATION IN THREEDIMENSIONAL EULER AND TURBULENCE.- Superfluid turbulence.- SUPERFLUID TURBULENCE AND DYNAMICS OF QUANTIZED VORTICES.- DECAY OF QUANTUM TURBULENCE BY KELVINWAVE CASCADE.- FLOW PHASE DIAGRAM FOR THE HELIUM SUPERFLUIDS.
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