Progress in Turbulence VI: Proceedings of the iTi Conference on Turbulence 2014Joachim Peinke, Gerrit Kampers, Martin Oberlack, Marta Waclawcyk, Alessandro Talamelli This volume collects the edited and reviewed contributions presented in the 6th iTi Conference in Bertinoro, covering fundamental and applied aspects in turbulence. In the spirit of the iTi conference, the volume has been produced after the conference so that the authors had the possibility to incorporate comments and discussions raised during the meeting. In the present book the contributions have been structured according to the topics : I Theory II Wall bounded flows III Particles in flows IV Free flows V Complex flows The volume is dedicated to the memory of Prof. Konrad Bajer who prematurely passed away in Warsaw on August 29, 2014.

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Contents
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A Marker for Studying the Turbulent Energy Cascade in Real Space  27 
Scale Energy of Turbulence Based on TwoPoint Velocity Correlation  33 
A Numerical Study of the ShearLess TurbulentNonturbulent Interface  37 
The Imbalance Between Enstrophy Production and Destruction in Homogeneous Isotropic Unsteady Turbulence  41 
Convection and Wave Velocities in Turbulent Shear Flows  47 
WallTurbulence Structure with Pressure Gradient Around 2D Hump  165 
Effect of Domain Size and Development Time  172 
Heat Transfer in a Shallow Cavity  179 
Temperature Effects in HotWire Measurements on HigherOrder Moments in Wall Turbulence  184 
Quantification of Global Intermittency in Stably Stratified Ekman Flow  191 
A Comparison Between DBD and Corona Actuators with NonStraight Electrodes  196 
Part IIIPipe Flows  202 
The Final Design of the Long Pipe in CICLOPE  203 
Concurrent Scale Interactions in the FarField of a Turbulent Mixing Layer  55 
Euler Angle and AxisFingerprints of a SubgridScale Stress Model  59 
LowCost EnergyPreserving RK Schemes for Turbulent Simulations  64 
Assessment of Subfilter Scalar Dissipation Rate and Mixture Fraction Variance Models  69 
Backward Energy Transfer and Subgrid Modeling Approaches in WallTurbulence  75 
Building Proper Invariants for EddyViscosity Models  79 
Analysis of a Hybrid RANSLES Model Using RANS Reconstruction  83 
On the Coupling of Direct Numerical Simulation and Resolvent Analysis  87 
Modeling Helicity DissipationRate Equation  92 
Analysis of the Bivariate EMD Behavior for Separating Coherent Structures from Interference Fluctuations in Isotropic Homogeneous Turbulence  97 
Turbulent Shear Flows Described by the Algebraic DifferenceQuotient Turbulence Model  105 
Lyapunov Stability Criteria for Reacting Ionic Fluid Flows  110 
DNS and LES of ViscoplasticType NonNewtonian Fluid Flows  117 
Part IIWall Bounded Flows  121 
Flow Features in ThreeDimensional Turbulent Duct Flows with Different Aspect Ratios  122 
DNS of the Turbulent Flow Evolving in a Plane Channel from the Entry to the Fully Developed State  127 
Downstream Evolution of Perturbations in a Zero Pressure Gradient Turbulent Boundary Layer  133 
Scale Dependent Stochastic Selfenergy Model of the Energy Transfers in Turbulent Channel Flows  138 
Effect of Irregular Surface in a Turbulent Channel  145 
On the Effects of Surface Morphology on the Structure of WallTurbulence  149 
Contradictions in the LargeWavelength Approximation of Turbulent Flow Past a Wavy Bottom  155 
Wall Oscillation Induced Drag Reduction of Turbulent Boundary Layers  160 
A New HighOrder Method for Simulating Turbulent Pipe Flow  211 
Structure Investigation in Pipe Flow at High Reynolds Numbers  216 
A Wavelet Transforms Approach  221 
Part IVFree Flows  227 
Influence of an Extended Nonequilibrium Region on the FarField of Grid Turbulence  229 
Anisotropy of Multiscale Grid Turbulence  239 
Flow Field Topology of Impinging Jets with Fractal Inserts  243 
Experimental Study on HotWire Spatial Resolution in Turbulent Round Jet  249 
ThreeDimensional Instabilities in the Wake of a WallMounted LowAspectRatio Pyramid  253 
The Fine Structure of a Slender Scalar Plume in Sheared Turbulence  259 
Wake Dynamics Behind a Normal Thin Flat Plate at Moderate Reynolds Numbers  265 
Part VComplex Flows  270 
Storm in a Soap Bubble  273 
Turbulent Boundary Layer Upstream Over and Downstream a Cylindrical 2D Bump  279 
Effects of a Wall on the Dynamics of Turbulence Teardrops and Fingerprints  285 
Numerical Study of the Intermittency Region in TwoFluid Turbulent Flow  289 
Multiscale Analysis of Turbulent RayleighBénard Convection  294 
Numerical Analysis of Frazil Ice Formation in Turbulent Convection  299 
Benchmarking on a Rectangular Prism  305 
Turbulent Flow of a Suspension of Rigid Spherical Particles in Plane Channels  310 
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boundary layer Cimarelli coefficients computational convection correlation decay density derivative diffusion direct numerical simulation domain downstream drag dynamics email eddy energy transfer enstrophy Euler angle evolution experimental filter Fluid Mech fractal fractal grid frequency function gradient homogeneous hotwire interaction International Publishing Switzerland invariant isotropic turbulence kinetic energy laminar large eddy simulation largescale mean velocity measurements method nearwall nonequilibrium obtained parameters particle image velocimetry Peinke Phys Physics 165 plumes pressure Proceedings in Physics Progress in Turbulence Publishing Switzerland 2016 region Reynolds number Reynolds stress scalar scale space scales shear flows shear stress shown smallscale spanwise spatial spectral Springer International Publishing Springer Proceedings statistics structures subgrid surface symmetries temperature tensor turbulence intensity turbulent boundary layer turbulent channel flow turbulent flows Vassilicos velocity field velocity fluctuations viscous vorticity wake wall wallnormal wavenumber