Progress in Turbulence II: Proceedings of the Iti Conference in Turbulence 2005

ISBN-13: 9783642069031 / Angielski / Miękka / 2010 / 306 str.

Martin Oberlack; George Khujadze; Silke Guenther

Opis

Besides turbulence there is hardly any other scientific topic which has been considered as a prominent scientific challenge for such a long time. The special interest in turbulence is not only based on it being a difficult scientific problem but also on its meaning in the technical world and our daily life. This carefully edited book comprises recent basic research as well as research related to the applications of turbulence. Therefore, both leading engineers and physicists working in the field of turbulence were invited to the iTi Conference on Turbulence held in Bad Zwischenahn, Gemany 25th - 28th of September 2005. Discussed topics include, for example, scaling laws and intermittency, thermal convection, boundary layers at large Reynolds numbers, isotropic turbulence, stochastic processes, passive and active scalars, coherent structures, numerical simulations, and related subjects.

Spis treści

Fundamentals.- What Rayleigh-Bénard, Taylor-Couette and Pipe Flows have in Common.- Small-Scale Statistics in High-Resolution Direct Numerical Simulation of Turbulence.- Numerical Investigation of Turbulent Jet Under Random Waves.- Scale-by-Scale Assessments of the Approach to Isotropy.- On the Decay of Isotropic Turbulence.- Oscillatory Relaxation Towards Turbulent States.- An Exact Solution for the Forced Burgers Equation.- Consistent Invariant Modelling of Axially Rotating Pipe Flow.- Small-Scale Anisotropy in MHD Turbulence Under Strong Uniform Magnetic Field.- Scaling in an Ensemble of Stochastic Forced Point Vortices.- Multiplier Statistics Explained by Stochastic Cascade Processes.- DNS and Scaling Laws of a Turbulent Channel Flow with Streamwise Rotation.- Experiments.- Characterization of a Turbulent Vortex Using Phase Averaged PIV Data.- Experimental Detection of the New Phenomenon of Turbulent Thermal Diffusion.- Anemometry in Snow Particle Flows.- Numerical and Experimental Investigations of the Dynamics and Structure of the Recirculation Zone in a Coaxial Jet Mixer.- On Anisotropy of Turbulent Flows in Regions of “Negative Eddy Viscosity”.- Experimental Analysis on the Transition Process of Internal Gravity Waves in a Strongly Stably-Stratified Mixing Layer.- The Correlation Between Velocity and Acceleration in Turbulence.- PIV Measurement of Coherent Structures and Turbulence Created by an Oscillating Flow at the End of a Thermoacoustic Stack.- Statistics of the Temperature Fluctuations as a Passive Scalar in a Freejet Experiment.- Coherent Structure.- Coherent Structures Identification in 2D Turbulence.- Multi-resolution Analysis of the Large-scale Coherent Structure in a Turbulent Separation Bubble Affected by Unsteady Wake.- Effect of Spanwise System Rotation on Longitudinal Vortical Structure of Homogeneous Shear Flow.- Generation of Large-scale Vorticity in Sheared Homogeneous and Rotating Inhomogeneous Turbulence.- Mean Modal Analysis of the Coherent Structures in a Two-dimensional Vortex Merger.- Low-Frequency Coherent Structures in Turbulent Flows.- Turbulent Boundary Layers.- Large-eddy Simulation of Accelerating Boundary Layers.- Generation of Turbulent Inlet Conditions for Velocity/Thermal Boundary Layer Simulations.- Experimental Analysis of a Turbulent Boundary Layer at High Reynolds Numbers.- Hybrid RANS/LES of Neutral Atmospheric Boundary Layer: Simple Terrain.- Evidence on Non-Universality of Kármán Constant.- Turbulent Marginal Separation: A Novel Triple-Deck Problem for Turbulent Flows.- Symmetry-preserving Regularization Modeling of Turbulent Channel Flow.- Convection.- Numerical Experiments of Turbulent Thermal Convection at High Rayleigh Numbers.- Homogeneous Rayleigh-Bénard Convection.- A RANS Model for the Pressure-velocity Fluctuation Correlation.- Temperature Measurements in a Rectangular Rayleigh-Bénard Cell.- Inertial Convertion in a Vertical Channel.- Applying the Leray-? Model to Rayleigh-Bénard Convection.- Analysis of Thermal Dissipation Rates Based on Direct Numerical and Large–Eddy Simulations of Turbulent Rayleigh–B’enard Convection.- Scalar Mixing and Particles.- Inertial Particles in Turbulence.- Turbulent Pair Dispersion: A PTV Experiment.- Application of a Two-point Closure to the Dispersion of Particles in Isotropic and Sheared Turbulence.- Clustering of Inertial Particles.- Self Similar Two Particle Separation Model.- Coarse-grained Scalar Transport: Closures and Large-eddy Simulations.- Statistics and Geometry in High-Schmidt Number Scalar Mixing.- Polymer and Scalars.- Scale by Scale Budget in Viscoelastic Wall Turbulence.- Alignment Statistics of a Passive Scalar Gradient in Nonstationary Flow Topology.- An Improved Model for the Turbulent Atmospheric Boundary Layer Including Urban Canopy.- LES of Turbulent Low Mach Number Shear Layers with Active Scalars Using Explicit Filtering.- Statistical Closures for Homogeneous Shear Flow Turbulence of Dilute Polymer Solutions.- Large Eddy Simulation.- Towards Wall Models for LES of Separated Flows.- Numerical Study of Turbulent Flow in a Triangular Duct with Internal Ribbed Surfaces.- Multi-Cycle Simulations of In-Cylinder Flows on Unstructured Grids using a Hybrid VLES Model.- Investigation of Lattice Boltzmann Methods for LES.- Conditional Averaging of the Fully Developed Stationary Ribbed Duct Flow Using Q Criteria.- Prediction of Flow and Heat Transfer in a Czochralski Crucible using LES with Interface Tracking.- Numerical Study of Turbulent Flow Around an Obstacle at the Wall of a Rectangular Duct.- Energy Content of Large-scale Turbulence in Wide Open Channel Flows.- Subgrid Modeling in Large-eddy Simulation of Complex Flows.