Progress In Turbulence And Wind Energy Iv: Proceedings Of The Iti Conference In Turbulence 2010 (springer Proceedings In Physics)

This fourth issue on "progress in turbulence" is based on the fourth ITI conference (ITI interdisciplinary turbulence initiative), which took place in Bertinoro, North Italy. Leading researchers from the engineering and physical sciences presented latest results in turbulence research. Basic as well as applied research is driven by the rather notorious difficult and essentially unsolved problem of turbulence. In this collection of contributions clear progress can be seen in different aspects, ranging from new quality of numerical simulations to new concepts of experimental investigations and new theoretical developments. The importance of turbulence is shown for a wide range of applications including: combustion, energy, flow control, urban flows, are few examples found in this volume. A motivation was to bring fundamentals of turbulence in connection with renewable energy. This lead us to add a special topic relevant to the impact of turbulence on the wind energy conversion. The structure of the present book is as such that contributions have been bundled according to covering topics i.e. I Basic Turbulence Aspects, II Particle Laden Flows, III Modeling and Simulations, IV, Experimental Methods, V Special Flows, VI Atmospheric Boundary Layer, VII Boundary Layer, VIII Wind Energy and IX Convection. This book is dedicated to the memory of Prof. Tim Nickels. Shortly after giving an invited lecture at the 4 th ITI conference, the turbulence community lost a world-class scientist, a friend and devoted family man. Front Matter....Pages 1-12 Front Matter....Pages 1-1 Scale-Energy Fluxes in Wall-Turbulent Flows....Pages 3-6 Conservation Laws of Helically Symmetric Flows and Their Importance for Turbulence Theory....Pages 7-10 Velocity/Pressure-Gradient Correlation Modelling for Improved Prediction of Reattachment and Relaxation....Pages 11-15 Turbulence without Richardson-Kolmogorov Cascade....Pages 17-20 New Statistical Symmetries of the Two-Point Correlation Equations for Turbulent Flows....Pages 21-24 Cumulant Corrections in Turbulence....Pages 25-30 Decaying Turbulence and Anomalous Dissipation....Pages 31-34 Secondary Splitting of Zero Gradient Points in Turbulent Scalar Fields....Pages 35-39 Multi-scale Analysis of Turbulence in CFD-Simulations....Pages 41-44 A Note on Spatial Zero Crossings of Fluctuating Velocity Field in Wall Bounded Turbulent Flows....Pages 45-48 Non-equilibrium Statistical Mechanics of Fluid Turbulence....Pages 49-55 Two-Point Enstrophy Statistics of Fully Developed Turbulence....Pages 57-60 Front Matter....Pages 61-61 Inertial Particles in a Turbulent Premixed Bunsen Flame....Pages 63-66 Lagrangian Acceleration Statistics in 2D and 3D Turbulence....Pages 67-70 Transport of Inertial Particles in Turbulent Jets....Pages 71-74 Probability Density Functions of Reacting Species Concentrations in Turbulent Wall-Jet....Pages 75-78 Front Matter....Pages 79-79 Characterisation of Synthetic Turbulence Methods for Large-Eddy Simulation of Supersonic Boundary Layers....Pages 81-84 A Uniformly Valid Theory of Turbulent Separation....Pages 85-89 Application and Comparison of Two Different DNS Algorithms for Simulating Transition to Turbulence in Taylor-Green Vortex Flow....Pages 91-94 Front Matter....Pages 95-95 Optimization of a Digital In-line Holography Setup Used with a High-Speed Camera....Pages 97-100 Front Matter....Pages 95-95 Development of Highly Resolving Drag Based Anemometers....Pages 101-104 Stability and Dynamics of Flow in a Turbulent Boundary Layer Separation Region....Pages 105-108 Front Matter....Pages 109-109 Reynolds Stress Modeling for Hypersonic Flows....Pages 111-114 Forced Magnetohydrodynamic Turbulence in Large Eddy Simulation of Compressible Fluid....Pages 115-118 Investigations of Cavity Noise Generation on a Cylinder....Pages 119-122 Aerodynamic Sound Generation by Turbulence in Shear Flows....Pages 123-127 Exact Coherent State with Travelling Hairpin Vortex in Plane Couette Flow....Pages 129-134 Travelling Wave Solutions in Square Duct Flow....Pages 135-138 Main Instabilities of Coaxial Jets....Pages 139-142 Set-Up of Anisotropy in a Spanwise Rotating Channel....Pages 143-146 Streamwise and Radial Decomposition of a Turbulent Axisymmetric Jet....Pages 147-150 The Turbulent Flow in the Close-Up Region of Fractal Grids....Pages 151-154 Front Matter....Pages 155-155 Statistical Characteristics of a 3 × 3 Neutrally Stratified Wind Turbine Array Boundary Layer....Pages 157-162 Enhancing the Simulation of Turbulent Kinetic Energy in the Marine Atmospheric Boundary Layer....Pages 163-166 Numerical Modeling of a WECs Power Performance under the Influence of Atmospheric and Synthetic Wind Fields....Pages 167-170 ABL-Flow over Hills: A Review of Theory and Wind Tunnel Studies....Pages 171-174 Application of Meteorological Data in Computational Modelling of Wind over Real Terrain Topography....Pages 175-178 Front Matter....Pages 179-179 A New Way to Determine the Wall Position and Friction Velocity in Wall-Bounded Turbulent Flows....Pages 181-185 DNS of Turbulent Boundary Layers Subjected to Adverse Pressure Gradients....Pages 187-190 Do Flexible Surface-Hairs Manipulate Near-Wall Turbulence?....Pages 191-196 Front Matter....Pages 179-179 Analysis of Development of Vortical Structures in a Turbulent Boundary Layer under Adverse Pressure Gradient Based on VITA Method....Pages 197-200 New Insights into Adverse Pressure Gradient Boundary Layers....Pages 201-204 Flat Plate Boundary Layer By-Pass Transition by Joint Action of Surface Roughness and External Turbulence....Pages 205-208 Low Speed Streaks Instability of Turbulent Boundary Layer Flows with Adverse Pressure Gradient....Pages 209-212 Turbulent Boundary-Layer Flow: Comparing Experiments with DNS....Pages 213-216 Identifying an Artificial Turbulent Spot in the Boundary Layer....Pages 217-220 Front Matter....Pages 221-221 Comparison between Wind Tunnel and Field Experiments on Wind Turbine Wake Meandering....Pages 223-226 Is the Actuator Disc Concept Sufficient to Model the Far-Wake of a Wind Turbine?....Pages 227-230 Turbulent Wind Turbine Wakes in a Wind Farm....Pages 231-234 Characterization and Stochastic Modeling of Wind Speed Sequences....Pages 235-238 Wind Turbines in ABL-Flow: A Review on Wind Tunnel Studies....Pages 239-242 Intermittent Fingerprints in Wind-Turbine Interactions....Pages 243-246 The Relevance of Turbulence for Wind Energy Related Research....Pages 247-250 The Influence of Turbulence and Vertical Wind Profile in Wind Turbine Power Curve....Pages 251-254 DNS of Actuator Disk Arrays in Ekman Boundary Layers: Preliminary Results....Pages 255-258 An Attempt to Characterize the Structure of Wake Turbulence Using a Combined Experimental and Numerical Approach....Pages 259-262 Lidar Turbulence Measurements for Wind Energy....Pages 263-270 Statistical Characteristics of Gusty Wind Conditionally Sampled with an Array of Ultrasonic Anemometers....Pages 271-274 Free-Stream Turbulence Effects on the Flow around an S809 Wind Turbine Airfoil....Pages 275-279 Front Matter....Pages 281-281 3-d Measurements of the Velocity in the Boundary Layer of Turbulent Convection....Pages 283-286 Front Matter....Pages 281-281 Experimental Study of the Near Wall Region of a Natural Convection Driven Flow Next to a Vertical Cylinder....Pages 287-291 Direct Numerical Simulations of Indoor Ventilation....Pages 293-296 Application of 3D Particle Tracking Velocimetry in Convection....Pages 297-300 Back Matter....Pages 0--1