Advances in Turbulence XII: Proceedings of the 12th EUROMECH European Turbulence Conference, September 7-10, 2009, Marburg, Germany

ISBN-13: 9783662519325 / Angielski / Miękka / 2016 / 973 str.

Bruno Eckhardt

Spis treści

Lagrangian aspects.- Lagrangian modeling and properties of particles with inertia.- Effect of Fax#x00E9;n forces on acceleration statistics of material particles in turbulent flow.- Lagrangian analysis of turbulent convection.- Linear and angular dynamics of an inertial particle in turbulence.- Collision rate between heavy particles in a model turbulent flow.- From cloud condensation nuclei to cloud droplets: a turbulent model.- Lagrangian statistics of inertial particles in turbulent flow.- Lagrangian statistics of two#x2013;dimensional turbulence in a square container.- Measurement of Lagrangian Particle Trajectories by Digital in-line Holography.- 3-D Particle Tracking Velocimetry (PTV) in gas flows using coloured tracer particles.- Two-particle dispersion in 2D inverse cascade turbulence and its telegraph equation model.- Numerical simulations of particle dispersion in stratified flows.- Instability and Transition.- Experimental study of the von K#x00E1;rm#x00E1;n flow from = 10 to 10: spontaneous symmetry breaking and turbulent bifurcations.- Flow reversals in a vertical channel.- Linear Instability of Streamwise Corner Flow.- DNS of turbulent plane Couette flow with emphasis on turbulent stripe.- Geometry of state space in plane Couette flow.- Linear and nonlinear instabilities of sliding Couette flow.- Localization in plane Couette edge dynamics.- Nonlinear optimal perturbations in plane Couette flow.- Order parameter in laminar-turbulent patterns.- Pattern formation in low Reynolds number plane Couette flow.- Quasi-stationary and chaotic convection in low rotating spherical shells.- Linear stability of 2D rough channels.- Transient turbulent bursting in enclosed flows.- On New Localized Vortex Solutions in the Couette-Ekman Layer.- Shear instabilities in Taylor-Couette flow.- Particle Tracking Velocimetry in Transitional Plane Couette Flow.- Experimental study of coherent structures in turbulent pipe flow.- Forced localized turbulence in pipe flows.- From localized to expanding turbulence.- Influence of test-rigs on the laminar-to-turbulent transition of pipe flows.- Interaction of turbulent spots in pipe flow.- Large-scale transitional dynamics in pipe flow.- Nonlinear coherent structures in a square duct.- Quantitative measurement of the life time of turbulence in pipe flow.- Experimental investigation of turbulent patch evolution in spatially steady boundary layers.- Interaction of noise disturbances and streamwise streaks.- Linear generation of multiple time scales by 3D unstable perturbations.- Convection at very high Rayleigh number: signature of transition from a micro-thermometer inside the flow.- Estimating local instabilities for irregular flows in the differentially heated rotating annulus.- Search for the #x201C;ultimate state#x201D; in turbulent Rayleigh-B#x00E9;nard convection.- Rayleigh#x2013;Taylor instability in two dimensions and phase-field method.- Split energy cascade in quasi-2D turbulence.- Stabililty and laminarisation of turbulent rotating channel flow.- The vortical flow pattern exhibited by the channel flow on a rotating system just past transition under the influence of the Coriolis force.- Transient evolution and high stratification scaling in horizontal mixing layers.- Control of turbulent flows.- Toward cost-effective Control of Wall Turbulence for Skin Friction Drag Reduction.- Active control of turbulent boundary layer using an array of piezo-ceramic actuators.- Flat plate turbulent boundary-layer control using vertical LEBUs.- Estimation of the spanwise wall shear stress based on upstream information for wall turbulence control.- Interactions between vortex generators and a flat plate boundary layer. Application to the control of separated flows..- Modulated global mode of a controlled wake.- Swirl effects in turbulent pipe flow.- Control of an axisymmetric turbulent wake by a pulsed jet.- Direct Numerical Simulations of turbulent mixed convection in enclosures with heated obstacles.- On Drag Reduction in Turbulent Channel Flow over Superhydrophobic Surfaces.- Response of Periodically Modulated Turbulence.- Turbulent drag reduction by feedback: a Wiener-filtering approach.- Vortex dynamics and structure formation.- A driving mechanism of turbulent puff in pipe flow.- Wavelet tools to study vortex bursting and turbulence production.- The minimum-enstrophy principle for decaying 2D turbulence in circular domains.- Direct numerical simulation of a turbulent vortex ring.- Reconnection of vortex bundles.- Turbulent energy cascade caused by vortex stretching.- Instabilities and transient growth of trailing vortices in stratified fluid.- Implementation of Vortex Stretching into the Two-Dimensional Navier-Stokes Equations via Arbitrary External Straining.- Turbulent cascade of a quantum fluid at finite temperature.- Visualization of quantum turbulence in He-B by thermal excitations.- The 3D structure of a dipole in a shallow two-layer fluid.- The 3D character of decaying turbulence in a shallow fluid layer.- Vortex dynamics in a Karman street behind a heated cylinder: defects and potentialities of acoustic diagnostics.- Asymmetric vortex shedding in the turbulent wake of a flat plate in a rotating fluid.- Stability of steady vortices and new equilibrium flows from #x201C;Imperfect-Velocity-Impulse#x201D; diagrams.- The effect of Freestream Turbulence on Far Axisymmetric Wakes.- Application of the deterministic turbulence method to study of LEBU-device mechanism.- The role of the intense vorticity structures in the turbulent structure of the jet edge.- Large Scale Dynamics of a Jet in a Counter Flow.- Dynamics of vortex filaments in turbulent flows and their impact on particle dispersion.- The effect of coherent structures on the secondary flow in a square duct.- Multiphase and non-Newtonian flows.- How to Discriminate Between Light and Heavy Particles in Turbulence.- Anisotropic clustering and particles velocity statistics in shear turbulence.- Direct Numerical Simulation of inertial particle accelerations in near-wall turbulence: effect of gravity.- Simulating Fibre Suspensions: Lagrangian versus Statistical Approach.- Inertial particles in a turbulent pipe flow: spatial evolution.- Heat transfer mechanisms in bubbly Rayleigh-B#x00E9;nard convection.- Scaling of polymer drag reduction with polymer and flow parameters in turbulent channel flow.- DNS study on #x201C;diameter effect#x201D; of drag reduction in viscoelastic-fluid flow.- Modifications of the turbulent structure in a bubbly boundary layer.- Budgets of polymer free energy in homogeneous turbulence.- Shear-induced self-diffusion in a Couette flow of a dilute suspension.- Atmospheric turbulence.- Turbulent flow over rough walls.- Top-down and bottom-up eddy motion in wall bounded turbulence.- A study of turbulent Poiseuille-Ekman flow at different rotation rates using DNS.- Experimental study of forced stratified turbulence.- DNS of the turbulent cloud-top mixing layer.- Modelling and Simulation of Momentum and Heat Transfer in the Atmospheric Boundary Layer over Rough Surface: Study with Improved Turbulence Model.- Wind Direction Effects on Urban Like Roughness: an LES Study.- Geophysical and astrophysical turbulence.- Anisotropy in turbulent rotating convection.- Nonlocal interactions and condensation in forced rotating turbulence.- Structural Features of Rotating Sheared Turbulence.- Structure functions and energy transfers in a decaying rotating turbulence experiment.- Table-top rotating turbulence: an experimental insight through particle tracking.- On the structure of rapidly-rotating, decaying turbulence.- Large-eddy simulations of gravity current flows past submerged cylinders.- Large scale quasi-2D structures and the problem of nonlinear bottom friction.- Double-period oscillation of passive scalar flux in stratified turbulence.- Energy spectra of stably stratified turbulence.- The wind-driven turbulent oscillating channel flow subjected to a stable stratification.- Numerical studies of turbulence in breaking internal waves.- Vortex self-similarity and the evolution of unforced inviscid two-dimensional turbulence.- Large Eddy Simulation of compressible magnetohydrodynamic turbulence in the local interstellar medium.- Transport and mixing.- Experimental Studies of Turbulent Rayleigh-B#x00E9;nard Convection.- Various flow amplitudes in 2D non-Oberbeck-Boussinesq Rayleigh-B#x00E9;nard convection in water.- A comparison of turbulent thermal convection between conditions of constant temperature and constant heat flux boundaries.- Diffusion of heavy particles in turbulent flows.- Quantification of heavy particle segregation in turbulent flows: a Lagrangian approach.- The dispersion of lines written in a turbulent jet flow.- PDF modeling of vapour micromixing in turbulent evaporating sprays.- Forces on light particles in stratified turbulence.- Renormalized transport of inertial particles.- Turbulence modification in the vicinity of a solid particle.- Particle Transport in Turbulent Wakes Behind Spherical Caps.- Turbulent heat transfer and large-scale flow in convection cells with aspect ratio #x0393; #x003E; 1.- Shot noise of thermal plumes : Evidence of a boundary layer instability consistent with the onset of Kraichnan#x2019;s Regime of convection.- Scalar mixing in turbulent confined flow.- Prandtl-, Rayleigh-, and Rossby-number dependence of heat transport in turbulent Rotating Rayleigh-B#x00E9;nard convection.- Oscillations of Large-Scale Structures in turbulent Mixed Convection in a rectangular enclosure.- Interaction between slope flows and an urban heat island.- Origin of the small-scale anisotropy of the passive scalar fluctuations.- Mixing asymmetry in variable density turbulence.- Turbulent transport close to a wall.- Persistence of inhomogeneity of the turbulence generated by the static grid structure.- On the energy decay of grid generated turbulence.- Turbulent Entrainment in Jets: The role of Kinetic Energy.- Fast and slow changes of the length of gradient trajectories in homogeneous shear turbulence.- Wall bounded flows.- Coherent streaky structures and optimal perturbations of turbulent boundary layers.- Time-mean description of turbulent bluff-body separation in the high-Reynolds-number limit.- Isotropic Free-stream Turbulence Promotes Anisotropy in a Turbulent Boundary Layer.- Travelling waves in a straight square duct.- Thermal boundary layers in turbulent Rayleigh-B#x00E9;nard convection.- DNS of turbulent transport of scalar concentration in various thermally stratified boundary layers.- Wall turbulence without walls.- Turbulent flow and heat transfer in eccentric annulus.- On imperfect hot-wire resolution issues and their effect on mean quantities.- The diagnostic plot - a new way to appraise turbulent boundary-layer data.- DHMPIV and Tomo-PIV measurements of three-dimensional structures in a turbulent boundary layer.- LDA measurements of Reynolds stresses in a swirling turbulent pipe flow.- Time-resolved stereoscopic PIV of the log-layer in fully developed turbulent pipe flow.- Massive separation in rotating turbulent flows.- Scaling of torque in turbulent Taylor-Couette flow with background rotation.- Velocity gradient statistics in a turbulent channel flow.- Channel flow LES with stochastic modeling of the sub-grid acceleration.- DNS of three-dimensional separation in turbulent diffuser flows.- Optimal amplification of large scale streaks in the turbulent Couette flow.- Symmetry of Coherent Vortices in Plane Couette Flow.- Universal character of perturbation growth in near-wall turbulence.- Experimental assessment of turbulent drag reduction by wall traveling waves.- Effects of very-large roughness in turbulent channel flow.- Roughness effects in a rotating turbulent channel.- Mean Flow and Turbulence over Rough Surfaces.- Intermittency and scaling.- DNS of vibrating grid turbulence.- Step onset from an initial uniform distribution of turbulent kinetic energy..- Fractal-generated turbulent scaling laws from a new scaling group of the multi-point correlation equation.- Casimir Cascades in Two-Dimensional Turbulence.- The development of truncated inviscid turbulence and the FPU-problem.- The renormalized eddy-fragmentation equation and its exact solutions.- Determination of the statistics of the velocity gradient tensor as a function of scale : solution of the tetrad model.- TSF Experiment for comparision of high Reynold#x2019;s number turbulence in He I and He II : first results..- Extraction of the non-equilibrium energy spectrum in high Reynolds number turbulence.- Universality of Kolmogorov law in spectrally condensed turbulence in thin layers.- Multi-scale correlations in regular and fractal-generated turbulence.- On an alternative explanation of anomalous scaling and how inertial is the inertial range.- Phenomenological relation between the Kolmogorov constant and the skewness in turbulence.- Kolmogorov scaling and intermittency in Rayleigh-Taylor turbulence.- Observation of weak turbulence spectra of capillary waves.- A new numerical methodology to follow the time-decay of turbulence.- Velocity kinematic relations in decaying turbulent flow past a grid.- Lagrangian intermittency and time-correlations in two-dimensional turbulence.- Large eddy simulation.- Implicit Large-Eddy Simulation: Theory and Application.- A challenging new problem for LES: the flow near the turbulent/nonturbulent interface.- Towards practical large-eddy simulations of complex turbulent flows.- Coherent Vortex Simulation: application to 3D homogeneous isotropic turbulence.- LES of a Non-Premixed Flame with an Assumed Tophat FDF.- Closure models for inhomogeneous turbulence.- Statistical Mechanics of Fluid Turbulence based on the Cross-Independence Closure Hypothesis.- Large-Eddy Simulation of a Two-Phase Plane Mixing-Layer.- Subgrid particle resolution for the turbulent transport of a passive scalar.- An adaptive local deconvolution method for general curvilinear coordinate systems.- On under-resolved simulation of atmospheric convection.- The Multispectral Method: Progress and Prospects.- Discretization errors and subgrid scale implementations in Large Eddy Simulations.- Magnetohydrodynamical turbulence.- Reversals of the magnetic field generated by a turbulent flow.- Direct measurement of turbulent magnetic diffusivity in liquid metal flow.- Shell models of MHD turbulence.- Turbulence induced by magnetic fields.- Spin-up in MHD turbulence.- Influence of helicities on statistical properties of MHD turbulence.- Transient growth in MHD duct flow.- Optical visualisation of the flow around a cylinder in electrolyte under strong axial magnetic field..- Synthetic turbulence model and DNS for magnetohydrodynamics with rotation.- Spectral analysis of energy transfers in anisotropic MHD turbulence.- Acoustics of turbulence flows.- Boundary layer influence on cavity noise generation.- Instability waves as a source of subsonic jet noise.- Experimental study of sound production for constricted channels: application to simplified vocal tract geometries.- Turbulant Pressure Statistics in an Underwater Boundary-Layer Experiment.- Spectral reconstruction of sound radiated by an organ pipe.- Aerodynamic sound generation by turbulence in shear flows.- Reacting and compressible turbulence.- On implicit turbulence modeling for LES of compressible flows.- Injection of a plane reacting jet into a supersonic turbulent channel flow.- Turbulent premixed flame fronts: fractal scaling and implications for LES modeling.- Large eddy simulation of a lean premixed swirl flame in complex geometry - comparison of two turbulent combustion models.- Posters.- KS inertial range and validity of Richardson#x2019;s law.- Lagrangian Vortex Methods in Turbulent Channel Flows.- Unstable and turbulent flows simulated by means of the Boltzmann kinetic equation.- Natural Transition in Plane Poiseuille Flow.- Stabilization of the turbulent flows in anisotropic viscoelastic tubes.- Simulation of induced transition in hypersonic regime: Validation of foot print of the vortical structures.- Active grid generated turbulence.- Velocity characterisation of axisymmetric jets from human-sized channels.- The role of nonlocality in unsteady turbulence.- Coherent enstrophy production and dissipation in 2D turbulence with and without walls.- Space scale analysis of enstrophy transfers in two-dimensional turbulence.- Hydrodynamic stability of a stratified suspension flow in a plane channel.- Localization of compact invariant sets of the Lorenz#x2019; 1984 model.- Large-scale energy dissipation and equatorial superrotation in shallow water turbulence.- The effects of rain on wind-driven turbulent flow.- New results on grid-generated turbulence.- Gas-liquid interaction under vibration field effect.- An Invariant Nonlinear Eddy Viscosity Model based on a 4D Modelling Approach.- Projection of the turbulence closure problem on the invariant triangle as the basis for improved predictions of complex flows.- A computational study of the hydrodynamic forces on a rough wall.- Turbulent flow structure investigation within target fluidic flowmeter.- The Wake of a Single 2D Roughness Element Immersed in a Turbulent Boundary Layer.- High spanwise wall-shear stress events in turbulent duct flow.- A POD-based reconstruction method for the flow in the near-wall region.- Near-wall velocity and wall shear stress correlations in a separating boundary layer.- Lifetimes of flow topology in a turbulent boundary layer.- RDT or low wavenumber modes#x2019; dynamics?.- Intermittency in high resolution direct numerical simulation of turbulence in a periodic box: a wavelet viewpoint.- Detached Eddy Simulation of Turbulence Flows in a Pipe with Fractal Shape Orifices.- Recovery of subgrid-scale turbulence kinetic energy in LES of channel flow.- Beyond Reynolds stress analysis of quasilaminar flows.- Anisotropic Organised Eddy Simulation for statistical and hybrid modelling of turbulent flows around bodies.- Experimental vortex generation and instabilities at flow around a magnetic obstacle.- A dynamic multiscale subgrid model for MHD turbulence based on Kolmogorov#x2019;s equation.- Low-Prandtl number MHD cooling in a vertical cylindrical container.- Anomalous scaling of passively advected magnetic field in the kinematic MHD Kazantsev-Kraichnan model.- A new compressible turbulence model for free and wall-bounded shear layers.- Modelling of turbulent flow in a gas burner.

O autorze

Bruno Eckhardt ist Professor für Theoretische Physik an der Universität Marburg. Er wurde mit zahlreichen Preisen ausgezeichnet; u.a. ist er Gottfried Wilhelm-Leibniz-Preisträger 2002.

Blurb

This volume comprises the communications presented at the EUROMECH European
Turbulence Conference ETC12, held in Marburg in September 2009. The topics covered by the meeting include:

• Acoustics of turbulent flows     
• Atmospheric turbulence
• Control of turbulent flows
• Geophysical and astrophysical turbulence
• Instability and transition
• Intermittency and scaling
• Large eddy simulation and related techniques
• Lagrangian aspects
• MHD turbulence
• Reacting and compressible turbulence
• Transport and mixing
• Turbulence in multiphase and non-Newtonian flows
•  Vortex dynamics and structure formation
•  Wall bounded flows