Description |
1 online resource (180 pages) |
Series |
Springer theses, 2190-5061 |
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Springer theses.
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Contents |
Intro; Supervisor's Foreword; Parts of this thesis have been published in the following journal articles:; Acknowledgements; Contents; Abbreviations; Non-dimensional Quantities; Roman Symbols; Greek Symbols; Subscripts; Superscripts; Operators; 1 Introduction; 1.1 Aim of the Industrial Research Project; 1.2 The Need for Fundamental Research; 1.3 Introduction to Multiphase Flows; 1.3.1 Scope of the Literature Review; 1.3.2 Plan of the Chapter; 1.4 Equations of Motion for an Arbitrary Object in a Continuum Fluid; 1.4.1 Spherical Shape and Stokes Flow Simplification; 1.4.2 ̀Heavy' Simplification |
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1.5 Validity of ̀Small' ̀Heavy' Spheres in Turbulent Flows1.5.1 Physics of ̀Small' ̀Heavy' Particles in Homogeneous Turbulence; 1.6 ̀Large' ̀Light' Spheres; 1.7 Aspherical Objects; 1.7.1 Geometrical Classification of Shape; 1.7.2 Shape Factors for Quasi-spherical Objects; 1.7.3 Drag Correlations; 1.7.4 Secondary Motion; 1.8 Aspherical Particles in Turbulence; 1.9 Summary of the Literature Review; 1.10 Case Study of the Problem; 1.10.1 Aquavitrum Technology; 1.10.2 Aquavitrum Water Tank; 1.10.3 Working Principle; 1.10.4 Particle Characterization; 1.10.5 Homogeneous Isotropic Turbulence |
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1.10.6 The Turbulent Box Assumption1.11 Organisation of the Thesis; References; 2 Planar Particles in Quiescent Fluid; 2.1 Introduction; 2.2 Experimental Techniques; 2.2.1 Particle Tracking; 2.2.2 Volumetric PIV; 2.3 Settling Dynamics of Disk-Like Particles; 2.3.1 Methods; 2.3.2 Results; 2.3.3 Drag Correlation for Planar Irregular Particles; 2.3.4 Summary; 2.4 Planar N-Sided Particles in Quiescent Flow; 2.4.1 Methods; 2.4.2 Determination of Non-dimensional Parameters and Phase Diagram; 2.4.3 Results; 2.4.4 Revisiting the Phase Diagram; 2.4.5 Simple Pendulum Approach: Planar Flutter |
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2.4.6 Simple Pendulum Approach: Transition Motion2.4.7 Andersen Approach to Planar Flutter; 2.4.8 Summary; 2.5 Wake Characteristics Behind N-Sided Polygons Settling in Quiescent Flow; 2.5.1 Methods; 2.5.2 Results; 2.5.3 Trajectory Characteristics; 2.5.4 Wake Characteristics; 2.5.5 Summary; 2.6 Conclusion; References; 3 Facility for Turbulence Generation; 3.1 Introduction; 3.1.1 Turbulence in Zero-Mean Flow Facilities; 3.1.2 Decay of Homogeneous Turbulence; 3.1.3 Confinement Effects on Decay of Homogeneous Turbulence; 3.2 Experimental Setup and Measurement Technique |
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3.2.1 Facility Description and Firing Protocol3.2.2 Particle Image Velocimetry (PIV) Measurements; 3.3 Results for Stationary Turbulence; 3.3.1 Single-Point Statistics and Flow Quality; 3.3.2 Multi-point Statistics and Flow Scales; 3.4 Results for Decaying Turbulence; 3.5 Summary; References; 4 Disks Falling Under Background Turbulence; 4.1 Introduction; 4.1.1 Spherical Particles Settling Under Turbulence; 4.1.2 Quasi-spherical Particles Settling Under Turbulence; 4.2 Experimental Setup; 4.3 Results; 4.3.1 Disks in Quiescent Flow; 4.3.2 Disks in Turbulent Flow; 4.4 Summary; References |
Summary |
This book studies the dynamics of 2D objects moving through turbulent fluids. It examines the decay of turbulence over extended time scales, and compares the dynamics of non-spherical particles moving through still and turbulent fluids. The book begins with an introduction to the project, its aims, and its relevance for industrial applications. It then discusses the movement of planar particles in quiescent fluid, and presents the numerous methodologies used to measure it. The book also presents a detailed analysis of the falling style of irregular particles, which makes it possible to estimate particle trajectory and wake morphology based on frontal geometry. In turn, the book provides the results of an analysis of physically constrained decaying turbulence in a laboratory setting. These results suggest that large-scale cut-off in numerical simulations can result in severe bias in the computed turbulent kinetic energy for long waiting times. Combining the main text with a wealth of figures and sketches throughout, the book offers an accessible guide for all engineering students with a basic grasp of fluid mechanics, while the key findings will also be of interest to senior researchers |
Bibliography |
Includes bibliographical references |
Notes |
5 Conclusions |
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Print version record |
Subject |
Fluid mechanics.
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Turbulence.
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Particles.
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Fluid mechanics
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Particles
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Turbulence
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Form |
Electronic book
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ISBN |
9783030281366 |
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3030281361 |
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9783030281359 |
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3030281353 |
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9783030281373 |
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303028137X |
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9783030281380 |
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3030281388 |
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