Keywords:
Atmospheric turbulence--Congresses.
;
Electronic books.
Description / Table of Contents:
Held at the National Center for Atmospheric Research, Boulder, CO, June 16-19, 1998.
Type of Medium:
Online Resource
Pages:
1 online resource (297 pages)
Edition:
1st ed.
ISBN:
9789401009287
Series Statement:
Fluid Mechanics and Its Applications Series ; v.58
URL:
https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=3069670
DDC:
533/.62
Language:
English
Note:
Intro -- Title Page -- Copyright Page -- Contents -- PREFACE -- A BRIEF HISTORY OF THE GEOPHYSICAL TURBULENCEPROGRAM AT NCAR -- References -- THE METEOROLOGICAL DEVELOPMENT OF LARGE EDDYSIMULATION -- 1. Pre-LES Development within the Atmospheric Science Community -- 2. Subgrid Scale Turbulence Closures -- 3. Deardorff's contributions -- 4. Some Direct and Indirect Descendants -- References -- DEVELOPMENTS IN HIGH-RAYLEIGH NUMBER CONVECTION -- 1. Introduction -- 2. The Rayleigh-Benard problem -- 3. Effects of rotation and transition from rotating to non-rotatingconvection -- 5. Salt-finger convection in the thermocline -- 6. Wave-convection coupling -- 7. Melting and freezing -- 8. Oceanic deep convection -- 9. Lateral exchange flows driven by horizontal gradients -- 10. Conclusions -- Acknowledgments -- References -- DIRECT NUMERICAL SIMULATION OF PARTICLE MOTIONIN RELATION TO STRUCTURES IN THE CONVECTIVEBOUNDARY LAYER -- 1. Introduction -- 2. Preferential concentration -- 3. Simulation of the fluid flow and the particle trajectories -- 3.1. THE FLUID FLOW -- 3.2. PARTICLE MOTION -- 3.3. COMPUTATIONAL PROCEDURES -- 4. Results -- 4.1. THE FLUID FLOW -- 4.2. PARTICLE RESULTS -- 4.3. FLUID TRACER RESULTS -- 5. Summary and Conclusion -- Acknowledgements -- References -- BOUNDARY SOURCES OF POTENTIAL VORTICITYIN GEOPHYSICAL CIRCULATIONS -- 1. Introduction -- 1.1. THE PV DYNAMICS OF THE WIND DRIVEN OCEAN CIRCULATION -- 1.2. BOUNDARY CONTRIBUTIONS TO STRATIFIED POTENTIAL VORTICITY -- 2. Description of Experiments -- 3. Effects of Sloping Western Boundary Topography on the Large-scale Flow -- 4. Dynamic Balances in the Western Boundary Region -- 5. Summary -- Acknowledgment -- References -- THREE-DIMENSIONAL INITIATION OFTHERMOHALINE FINGERING -- Abstract -- 1. Introduction -- 2. Computational Method -- 3. Results -- 4. Summary and Conclusions.
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Acknowledgments -- References -- ASPECTS OF STRATIFIED TURBULENCE -- Abstract. -- 1. Introduction -- 2. Equations of Motion -- 3. Evolution of Stratified Turbulence -- 4. Decay of Stratified Turbulence -- 5. Summary -- Acknowledgments. -- References -- PARTICLE DISPERSION AND VORTEX FORMATION INROTATING STRATIFIED TURBULENCE -- Abstract. -- 1. Introduction -- 2. Methodology -- 3. Particle Dispersion -- 4. Vortex Formation -- 5. Discussion -- References -- STRUCTURAL FEATURES OF BREAKING WAVESIN STRATIFIED FLOW OVER MOUNTAINS -- 1. Introduction -- 2. Experimental Method -- 3. Temporal evolution -- 4. Transverse vortex -- 5. Toroidal vortices -- 6. Discussion and conclusion -- 7. Acknowledgments -- 8. References -- VORTEX PERSISTENCE: A RECENT MODEL FOR STRATIFIEDENTRAINMENT AND ITS APPLICATION TO GEOPHYSICALFLOWS -- Abstract. -- 1. Introduction -- 2. The Limit of Large Richardson Number -- 3. Solid Interface -- 4. Application to Geophysical Flows -- 5. Conclusions -- References -- FORMATION OF TRACER GRADIENTS IN NEARLY TWODIMENSIONALFLOWS -- 1. Introduction -- 2. Tracer gradient amplification in 2D -- 2.1. ANALOGY BETWEEN THREE-DIMENSIONAL VORTICITYSTRETCHING AND THE TWO-DIMENSIONAL TRACER GRADIENTAMPLIFICATION -- 2.2. FIRST ORDER DYNAMICS -- 2.3. SECOND ORDER DYNAMICS -- 2.4. GENERALIZATION TO NEARLY 2D (QUASIGEOSTROPHIC) FLOWS -- 3. Alignment of tracer gradient using second order LagrangianDynamics -- 3.1. AMPLIFICATION OF TRACER GRADIENT NORM -- 3.2. ALIGNMENT DYNAMICS -- 4. Conclusion -- References -- EVOLUTION OF A TRACER GRADIENT IN ANINCOMPRESSIBLE, TWO-DIMENSIONAL FLOW -- Abstract. -- 1. Main Analysis -- 2. Degenerate cases -- 3. Some examples and limitations -- 3.1. RIGID-BODY ROTATION: -- 3.2. EXTENDING FLOW: -- 3.3. PARALLEL SHEAR FLOW: -- 3.4. POINT VORTEX: -- Acknowledgments -- References.
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COMMENTS ON " EVOLUTION OF A TRACER GRADIENTIN AN INCOMPRESSIBLE, TWO-DIMENSIONAL FLOW" BYHARVEY SEGUR -- References -- ANALYTICAL MODELS FOR VERTICAL COLLAPSE ANDINSTABILITY IN STABLY STRATIFIED FLOWS -- 1. Introduction -- 2. Low Froude Number Limiting Dynamics for Strongly Strati fiedFlows -- 2.1. EXACT VORTICITY AND DISSIPATION FORMULAS FOR THELIMITING DYNAMICS -- 3. The Effect of Reynolds and Rossby Numbers on Vertical Col lapsein Low Froude Number Limiting Dynamics -- 3.1. THE EFFECT OF REYNOLDS NUMBER ON THE MODEL SOLUTIONS FOR VERTICAL COLLAPSE -- 3.2. THE EFFECT OF A FINITE ROSSBY NUMBER ON THE MODEL SOLUTION FOR VERTICAL COLLAPSE -- 4. Elementary Analytic Models for Comparing Instabilities at Low Froude Numbers with the Low Froude Number Limit Dy namics -- 4.1. ELEMENTARY EXACT SOLUTIONS OF THE BOUSSINESQEQUATIONS -- 4.2. LOW FROUDE NUMBER LIMITING DYNAMICS FOR THE LAMINAR ELEMENTARY SOLUTIONS -- 4.3. INSTABILITIES FOR FINITE SMALL FROUDE NUMBERS FOR THE LAMINAR ELEMENTARY FLOWS -- 4.4. THE EFFECT OF SMALL SCALE PERTURBATIONS IN BOUSSINESQFLOWS AT LOW FROUDE NUMBERS -- 5. Concluding Discussion -- Acknowledgments -- References -- EMERGENCE OF CIRCUMPOLAR VORTEX IN TWODIMENSIONAL TURBULENCE ON A ROTATING SPHERE -- Abstract. -- 1. Introduction -- 2. Nondivergent Two Dimensional Flow on a Sphere -- 3. Weak Nonlinear Theory -- 4. Results with the Higher Resolution T341 -- 5. Concluding remarks -- References -- DIRECT LABORATORY SIMULATIONS OF 3D VORTEX STRUCTURES INSTABLY STRATIFIED ROTATING FLUIDS -- Abstract -- 1. Introduction -- 2. Laboratory simulations -- 2.1 WORKING MEDIUM -- 2.2 BOUNDARY CONDITIONS -- 2.3 MEASUREMENTS -- 2.3.1 Image acquisition -- 2.3.2 Velocity field reconstruction -- 2.4 VORTEX GENERATION -- 3. Results and Discussion -- 3.1 STRATIFIED DIPOLE -- 3.2 STRATIFIED ROTATING DIPOLE -- 4. Conclusions -- Acknowledgements.
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References -- STATISTICS OF COHERENT FINE SCALE STRUCTURE INTURBULENT MIXING LAYER -- 1. Introduction -- 2. Identification of Coherent Fine Scale Eddies -- 2.1. DNS OF TEMPORALLY DEVELOPING TURBULENT MIXING LAYER -- 2.2. IDENTIFICATION SCHEME OF COHERENT FINE SCALE EDDIES -- 3. Coherent Fine Scale Structure in Turbulent Mixing Layer -- 3.1. STATISTICS OF COHERENT FINE SCALE EDDIES -- 3.2. ANISOTROPY OF THE TURBULENT MIXING LAYER -- 4. Conclusions -- Acknowledgments -- References -- COHERENT FINE SCALE STRUCTURE -- STRUCTURE AND DYNAMICS OF SMALL-SCALETURBULENCE IN STABLY STRATIFIEDHOMOGENEOUS SHEAR FLOWS -- 1. Introduction -- 2. Dynamic Equations -- 3. Direct Numerical Simulations -- 3.1. FLOW STRUCTURES -- 3.2. VORTICITY FIELD -- 3.3. INTERACTION OF wAND 5 WITHOUT BUOYANCY EFFECTS -- 3.4. PASSIVE SCALAR GRADIENT DYNAMICS -- 3.5. ACTIVE SCALAR GRADIENT DYNAMICS -- 4. Conclusions -- Acknowledgements -- References -- SPECTRAL EDDY-VISCOSITY BASED LESOF SHEAR AND ROTATING FLOWS -- 1. LES in Fourier Space -- 2. Plane Poiseuille flow -- 3. Backward-facing step -- 4. Rotating Shear Flows -- 5. Conclusion -- 6. Aknowledgements -- References -- ENTRAINMENT AND SUBGRID LENGTHS CALESIN LARGE-EDDY SIMULATIONS OF ATMOSPHERICBOUNDARY-LAYER FLOWS -- 1. Introduction -- 2. Theoretical Background -- 2.1. SGS MODELS -- 2.2. LENGTH-SCALE MODELS -- 3. Calculations -- 4. Results -- 5. Non-Equilibrium Effects -- 5.1. FLOW ANALYSIS -- 5.2. ANALYTIC SOLUTIONS -- 5.2.1. Time decay of e -- 5.2.2. The SGS buoyancy flux -- 6. Summary and Outlook -- Acknowledgments -- References -- EXTENDING LUNDGREN'S TRANSFORMATION TOCONSTRUCT STRETCHED VORTEX SOLUTIONS OF THE3D NAVIER- STOKES AND EULER EQUATIONS -- 1. Introduction -- 2. The evolution of the columnar flow velocity field -- 3. An extension of Lundgren's transformation for a strain field -- 4. A Riccati equation for,.
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5. Non-axisymmetric solutions of the Navier-Stokes equations -- 6. Results for the Euler equations -- References -- A ONE-DIMENSIONAL MHD MODEL OF SOLAR FLARES:STATISTICS OR PHYSICS? -- 1. Abstract -- 2. Introduction -- 3. The model -- 4. The structures -- 5. The histograms -- 6. From bursty dissipation to intermittent heating -- 7. The two-dimensional case -- 8. Conclusion -- Acknowledgements -- References -- LIST OF PARTICIPANTS.
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