This book contains contributions by former students, colleagues and friends of Professor John L. Lumley, on the occasion of his 60th birthday, in recognition of his enormous impact on the advancement of turbulence research. A variety of experimental, computational and theoretical topics, including turbulence modeling, direct numerical simulations, compressible turbulence, turbulent shear flows, coherent structures and the Proper Orthogonal Decomposition are contained herein. The diversity and scope of these contributions are further acknowledgment of John Lumley's wide ranging influence in the field of turbulence. The large number of contributions by the authors, many of whom were participants in The Lumley Symposium: Recent Developments in Turbulence (held at ICASE, NASA Langley Research Center on November 12 & 13, 1990), has presented us with the unique opportu nity to select a few numerical and theoretical papers for inclusion in the journal Theoretical and Computational Fluid Dynamics for which Professor Lumley serves as Editor. Extended Abstracts of these pa pers are included in this volume and are appropriately marked. The special issue of TCFD will appear this year and will serve as an additional tribute to John Lumley. As is usually the case, the efforts of others have significantly eased our tasks. We would like to express our deep appreciation to Drs. R.
1. Turbulence Modeling and Simulations.- Parameterizing Turbulent Diffusion in the Atmospheric Boundary Layer.- Modeling the Dissipation-Rate Equation with the Aid of Direct Simulation Data.- Second-Order Modeling of Turbulent Diffusion in an Atmospheric Surface Layer.- Theoretical and Computational Study of Rotating Isotropi Turbulence.- Towards a Structure-Based Turbulence Model.- Effect of Mean Velocity Shear on the Dissipation Rate of Turbulent Kinetic Energy.- Advances in Modeling the Pressure Correlation Terms in the Second Moment Equations.- Modeling the Dissipation Rate in Rotating Turbulent Flows.- Mapping Closures for Turbulent Mixing and Reaction.- Subgrid Length-Scales for Large-Eddy Simulation of Stratified Turbulence.- 2. Coherent Structures and The Proper Orthogonal Decomposition.- Understanding Turbulence via Vortex Dynamics.- Heteroclinic Cycles, Exponential Tails, and Intermittency in Turbulence Production.- Models for the Structure and Dynamics of Near Wall Turbulence.- The Streamwise Evolution of Coherent Structures in the Axisymmetric Jet Mixing Layer.- On the Complexity of Turbulence Near a Wall.- Observations on the Proper Orthogonal Decomposition.- Lumley's PODT Definition of Large Eddies and a Trio of Numerical Procedures.- Propagating Structures in Wall-Bounded Turbulent Flows.- On the Hidden Beauty of the Proper Orthogonal Decomposition.- 3. Compressible Turbulence.- Mach Number Effects on Free and Wall Turbulent Structures in Light of Instability Flow Interactions.- Toward a Constitutive Relation in Compressible Turbulence.- Fluid Dynamics and Noise Emission Associated with Supersonic Jets.- Formulation of the Statistical Equations of Turbulent Flows with Variable Density.- A Density-Weighted Conditional Closure Model for Diffusion Flames.- Interaction Between Chemical Reaction and Turbulence in Supersonic Nonpremixed H2-Air Combustion.- Compressible Turbulence and Shock Waves.- Occurrence of Caustics for High Frequency Acoustic Waves Propagating Through Turbulent Fields.- Direct Simulation of Compressible Turbulence in a Shear Flow.- The Rapid Expansion of a Turbulent Boundary Layer in a Supersonic Flow.- 4. Turbulent Shear Flows.- Structural Genesis in Wall-Bounded Turbulent Flows.- Some Preliminary Experiments Concerning Thermal Dispersion in a Jet.- The Vortex Lattice Structure of Turbulent-Shear Flows.- Scalar Transport in a Longitudinal Vorticity System in Boundary Layers.- Conditionally Sampled Vorticities and Near-Wall Turbulence Structure.- Modeling the Effect of Initial and Free-Stream Conditions on Circular Wakes.- On the Aetiology of Shear Layer Vortices.- 5. General Topics in Turbulence.- Characterization and Compression of Turbulent Signals and Images Using Wavelet-Packets.- Self-Preservation of Temperature Fluctuations in Isotropic Turbulence.- The Turbulence Contribution to the Pressure Term in the Scalar-Flux Equations.- Long-Time Behavior of Material-Surface Curvature in Isotropic Turbulence.- Microbubble Drag Reduction on an Axisymmetric Body Under an Applied Axial Pressure Gradient.- Trilinear Coordinates in Fluid Mechanics.- An Alternative Approach to Disturbances in Boundary Layers.
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