Progress in Turbulence (eBook)

Preface 6
Contents 8
Mathematical Methods 13
Passive Scalar Diffusion as a Damped Wave 14
Extremalizing Vector Fields as Guides Toward Understanding Properties of Turbulence 18
Low-Wavenumber Forcing and Turbulent Energy Dissipation 22
New Potential Symmetries for a Generalised Inhomogeneus Nonlinear Diffusion Equation 30
DNS and New Scaling Laws of ZPG Turbulent Boundary Layer Flow 34
Linear Instability of a Slowly Divergent Planar Jet 38
On How Different Are Genuine and ‘Passive’ Turbulence 42
Upper Bound on the Heat Transport in a Heated From Below Fluid Layer 48
Scaling Laws and Intermittency 52
Symmetries and Boundary Layer Profiles for Scalar Fields 53
Energy and Dissipation Balances in Rotating Flows 57
Turbulent Cascade with Intermittency in View of Fragmentation Universalities 61
Observational Impact of Surrogacy on the Turbulent Energy Cascade 65
Conditional Statistics of Velocity Increments in Fully Developped Turbulence 69
A Simple Relation Between Longitudinal and Transverse Increments 73
Intermittency Exponent in High-Reynolds Number Turbulence 77
Modelling 81
An Alternative Model for Turbulent Flow and Forced Convection 82
Langevin Models of Turbulence 86
Renormalized Perturbation Theory for Lagrangian Turbulence 96
Modelling of the Pressure-Strain- and Diffusion- Term in Rotating Flows 100
Predicting Probability for Stochastic Processes with Local Markov Property 104
Stability of Turbulent Kolmogorov Flow 108
Conditional Moment Closure Based on Two Conditioning Variables 112
Stochastic Partial Differential Equations as a Tool for Solving PDF Equations 116
Non-unique Self-similar Turbulent Boundary Layers in the Limit of Large Reynolds Number 120
Experiments 124
Two-Point-Correlations in a Zero Pressure Gradient Boundary Layer at Re. = 54600 125
Measurements Over a Flat Plate With and Without Suction 129
MHD Taylor-Couette Flow for Small Magnetic Prandtl Number and With Hall Effect 133
Laser-Cantilever-Anemometer 137
Heteroclinic Cycles of Type II in the (2,3) Interaction in the GEOFLOW- Experiment 141
Experimental Visualization of Streamwise Streaks in the Boundary Layers of Rayleigh– B´enard Convection 145
Spatial Correlations in Turbulent Shear Flows 151
Hot-Wire and PIV Measurements in a High- Reynolds Number Turbulent Boundary Layer 155
Dynamics of Baroclinic Instabilities Using Methods of Nonlinear Time Series Analysis 159
Fabrication and Characterization of Miniaturized Thermocouples for Measurements in Flows 163
Temperature and Velocity Measurements in a Large– Scale Rayleigh- B´enard Experiment 167
Statistics and Scaling of the Velocity Field in Turbulent Thermal Convection 171
Simulation (DNS and LES) 179
Nonlinear Stochastic Estimation: A Tool for Deriving Appropriate Wall Models for LES 180
Generation of Mean Flows in Turbulent Convection 184
Control of a Turbulent Separation Bubble by Periodic Excitation 188
Stretching Rate of Passive Lines in Turbulence 192
Numerical Study of Particle Motion in a Turbulent Ribbed Channel Flow 198
A Fresh Approach to Large Eddy Simulation of Turbulence 202
Statistical Analysis of Turbulent Natural Convection in Low Prandtl Number Fluids 210
Computational Simulation of Transitional and Turbulent Shear Flows 214
Direct Numerical Simulations of Turbulent Rayleigh- B´enard Convection in Wide Cylinders 222
A Projective Similarity/Eddy-Viscosity Model for Large- Eddy Simulation 226
Passive Scalar Transport in Turbulent Supersonic Channel Flow 230