Time Symmetry Breaking In Turbulent Multi Particle Dispersion

Author : Jennifer Jucha
Publisher : Unknown
Page : 128 pages
File Size : 52,8 Mb
Release : 2015
Category : Electronic
ISBN : 3319191934

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Time-Symmetry Breaking in Turbulent Multi-Particle Dispersion by Jennifer Jucha Pdf

This thesis presents experimental and theoretical investigations of the connection between the time asymmetry in the short-time evolution of particle clusters and the intrinsic irreversibility of turbulent flows due to the energy cascade. The term turbulence describes a special state of a continuous medium in which many interacting degrees of freedom are excited. One of the interesting phenomena observed in turbulent flows is their time irreversibility. When milk is stirred into coffee, for example, highly complex and interwoven structures are produced, making the mixing process irreversible. This behavior can be analyzed in more detail by studying the dispersion of particle clusters. Previous experimental and numerical studies on the time asymmetry in two-particle dispersion indicate that particles separate faster backwards than forwards in time, but no conclusive explanation has yet been provided. In this thesis, an experimental study on the short-time behavior of two- and four-particle dispersion in a turbulent water flow between two counter-rotating propellers is presented. A brief but rigorous theoretical analysis reveals that the observed time irreversibility is closely linked to the turbulence energy cascade. Additionally, it is demonstrated experimentally that the addition of minute amounts of polymers to the flow has a significant impact on multi-particle dispersion due to an alteration of the energy cascade.

Author : Jennifer Jucha
Publisher : Springer
Page : 113 pages
File Size : 48,7 Mb
Release : 2015-07-20
Category : Science
ISBN : 9783319191928

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Time-Symmetry Breaking in Turbulent Multi-Particle Dispersion by Jennifer Jucha Pdf

This thesis presents experimental and theoretical investigations of the connection between the time asymmetry in the short-time evolution of particle clusters and the intrinsic irreversibility of turbulent flows due to the energy cascade. The term turbulence describes a special state of a continuous medium in which many interacting degrees of freedom are excited. One of the interesting phenomena observed in turbulent flows is their time irreversibility. When milk is stirred into coffee, for example, highly complex and interwoven structures are produced, making the mixing process irreversible. This behavior can be analyzed in more detail by studying the dispersion of particle clusters. Previous experimental and numerical studies on the time asymmetry in two-particle dispersion indicate that particles separate faster backwards than forwards in time, but no conclusive explanation has yet been provided. In this thesis, an experimental study on the short-time behavior of two- and four-particle dispersion in a turbulent water flow between two counter-rotating propellers is presented. A brief but rigorous theoretical analysis reveals that the observed time irreversibility is closely linked to the turbulence energy cascade. Additionally, it is demonstrated experimentally that the addition of minute amounts of polymers to the flow has a significant impact on multi-particle dispersion due to an alteration of the energy cascade.

Author : V. A. Miransky
Publisher : World Scientific
Page : 560 pages
File Size : 52,9 Mb
Release : 1993
Category : Science
ISBN : 9810215584

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Dynamical Symmetry Breaking in Quantum Field Theories by V. A. Miransky Pdf

The phenomenon of dynamical symmetry breaking (DSB) in quantum field theory is discussed in a detailed and comprehensive way. The deep connection between this phenomenon in condensed matter physics and particle physics is emphasized. The realizations of DSB in such realistic theories as quantum chromodynamics and electroweak theory are considered. Issues intimately connected with DSB such as critical phenomenona and effective lagrangian approach are also discussed.

Author : T. D. Lee
Publisher : University of Washington Press
Page : 86 pages
File Size : 49,7 Mb
Release : 1988
Category : Science
ISBN : 0295965193

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Symmetries, Asymmetries, and the World of Particles by T. D. Lee Pdf

Discusses mirror symmetry, a symmetries, time reversal, vacuum as a physical medium, spontaneous symmetry breaking, particles, and quarks.

Author : Edward Farhi,R. Jackiw
Publisher : World Scientific
Page : 432 pages
File Size : 48,6 Mb
Release : 1982
Category : Science
ISBN : 9971950243

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Dynamical Gauge Symmetry Breaking by Edward Farhi,R. Jackiw Pdf

This book is a collection of original papers on dynamical gauge symmetry breaking, and is intended for graduate students and researchers in theoretical physics (elementary particle physics and others) who have an understanding of basic quantum field theory. The book can serve as a research text for those requiring an introduction to dynamical gauge symmetry breaking and as a reference text for active researchers. The important papers in the field that are included deal with attempts to apply the ideas to realistic models of elementary particle interactions. A historical critique by the editors provides an introductory review.

Author : Krayer, Michael Werner Tobias
Publisher : KIT Scientific Publishing
Page : 290 pages
File Size : 43,7 Mb
Release : 2023-09-11
Category : Electronic
ISBN : 9783731513100

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A hydrodynamical perspective on the turbulent transport of bacteria in rivers by Krayer, Michael Werner Tobias Pdf

The transport of bacteria in turbulent river-like environments is addressed, where bacterial populations are frequently encountered attached to solids. This transport mode is investigated by studying the transient settling of heavy particles in turbulent channel flows featuring sediment beds. A numerical method is used to fully resolve turbulence and finite-size particles, which enables the assessment of the complex interplay between flow structures, suspended solids and river sediment.

Author : Anonim
Publisher : Unknown
Page : 1206 pages
File Size : 41,6 Mb
Release : 1993
Category : Physics
ISBN : STANFORD:36105008985751

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Physics Briefs by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 1216 pages
File Size : 53,5 Mb
Release : 1976-06
Category : Nuclear energy
ISBN : PSU:000047758964

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Nuclear Science Abstracts by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 348 pages
File Size : 43,8 Mb
Release : 1992
Category : Mechanics, Applied
ISBN : OSU:32435026160556

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Applied Mechanics Reviews by Anonim Pdf

Author : Bruno Eckhardt
Publisher : Springer
Page : 0 pages
File Size : 40,7 Mb
Release : 2016-09-27
Category : Science
ISBN : 3662519321

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Advances in Turbulence XII by Bruno Eckhardt Pdf

Lagrangian aspects.- Lagrangian modeling and properties of particles with inertia.- Effect of Faxén 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–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 Kármán 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 “ultimate state” in turbulent Rayleigh-Bénard convection.- Rayleigh–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.-

Author : Anonim
Publisher : Unknown
Page : 652 pages
File Size : 50,8 Mb
Release : 1994
Category : Aeronautics
ISBN : UIUC:30112067190022

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Scientific and Technical Aerospace Reports by Anonim Pdf

Author : John Iliopoulos
Publisher : Oxford University Press
Page : 176 pages
File Size : 46,8 Mb
Release : 2017-09-22
Category : Science
ISBN : 9780192527530

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The Origin of Mass by John Iliopoulos Pdf

The discovery of a new elementary particle at the Large Hadron Collider at CERN in 2012 made headlines in world media. Since we already know of a large number of elementary particles, why did this latest discovery generate so much excitement? This small book reveals that this particle provides the key to understanding one of the most extraordinary phenomena which occurred in the early Universe. It introduces the mechanism that made possible, within tiny fractions of a second after the Big Bang, the generation of massive particles. The Origin of Mass is a guided tour of cosmic evolution, from the Big Bang to the elementary particles we study in our accelerators today. The guiding principle of this book is a concept of symmetry which, in a profound and fascinating way, seems to determine the structure of the Universe.

Author : Anonim
Publisher : Unknown
Page : 854 pages
File Size : 55,5 Mb
Release : 2002
Category : Dissertations, Academic
ISBN : STANFORD:36105112755728

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Dissertation Abstracts International by Anonim Pdf

Author : John Lin,Dominik Brunner,Christoph Gerbig,Andreas Stohl,Ashok Luhar,Peter Webley
Publisher : John Wiley & Sons
Page : 591 pages
File Size : 54,8 Mb
Release : 2013-05-09
Category : Science
ISBN : 9781118704394

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Lagrangian Modeling of the Atmosphere by John Lin,Dominik Brunner,Christoph Gerbig,Andreas Stohl,Ashok Luhar,Peter Webley Pdf

Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 200. Trajectory-based (“Lagrangian”) atmospheric transport and dispersion modeling has gained in popularity and sophistication over the previous several decades. It is common practice now for researchers around the world to apply Lagrangian models to a wide spectrum of issues. Lagrangian Modeling of the Atmosphere is a comprehensive volume that includes sections on Lagrangian modeling theory, model applications, and tests against observations. Published by the American Geophysical Union as part of the Geophysical Monograph Series. Comprehensive coverage of trajectory-based atmospheric dispersion modeling Important overview of a widely used modeling tool Sections look at modeling theory, application of models, and tests against observations

Author : Anonim
Publisher : Unknown
Page : 628 pages
File Size : 46,6 Mb
Release : 1987
Category : Power resources
ISBN : MINN:30000010505588

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Energy Research Abstracts by Anonim Pdf