The ability to predict and control viscous flow phenomena is becoming increasingly important in modern industrial application. The Instability and Transition Workshop at Langley was extremely important in help§ ing the scientists community to access the state of knowledge in the area of transition from laminar to turbulent flow, to identify promising future areas of research and to build future interactions between researchers worldwide working in the areas of theoretical, experimental and computational fluid and aero dynamics. The set of two volume contains panel discussions and research contribution with the following objectives: (1) expose the academic community to current technologically important issues of instability and transitions in shear flows over the entire speed range, (2) acquaint the academic community with the unique combination of theoretical, computational and experimental capabilities at LaRC and foster interaction with these facilities. (3) review current state-of-the-art and propose future directions for instability and transition research, (4) accelerate progress in elucidating basic understanding of transition phenomena and in transferring this knowledge into improved design methodologies through improved transition modeling, and (5) establish mechanism for continued interaction.

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Group Summary: Advanced Asymptotics.- Near-Planar TS Waves and Longitudinal Vortices in Channel Flow: Nonlinear Interaction and Focussing.- Amplitude-Dependent Neutral Modes in Compressible Boundary Layer Flows.- Effects of Streamwise Curvature Variations on Görtler Vortices.- Group Summary: Boundary Layer Stability.- The Effect of Approximations to the Thermodynamic Properties on the Stability of Compressible Boundary Layer Flow.- Analysis of Three-Dimensional Structures in Boundary Layers.- The In viscid Stability of Supersonic Flow Past Axisymmetric Bodies.- A Code for Linear Stability Analysis.- On the Continuous Spectra of the Compressible Boundary Layer Stability Equations.- Modulational Stability of Rotating-Disk Flow.- Group Summary: Free Shear Flows.- Bounded Free Shear Flows: Linear and Nonlinear Growth.- On the Classification of Unstable Modes in Bounded Compressible Mixing Layers.- Numerical Simulations of Compressible Mixing Layers.- Accurate Calculation and Instability of Supersonic Wake Flows.- Group Summary: Compressible Stability and Transition.- Effect of Wall Suction and Cooling on the Second Mode Instability.- On the Design of a New Mach 3.5 Quiet Nozzle.- On the Modelling of Roughness Effects.- The Stability of a Three Dimensional Laminar Boundary Layer over a Swept Flat Plate.- Group Summary: Transition Simulation 1.- Direct Numerical Simulation of the Transitional Zone.- Nonlinear Development of Crossflow Vortices.- Instabilities in Rotating Channel Flow.- Group Summary: Transition Simulation 2.- A Study of Turbulence Models for Prediction of Transitional Boundary Layers.- Numerical Simulation of Transition in a Rotating Disk Flow.- Numerical Study of Subcritical Flow with Fluid Injection.- Numerical Simulation of Spatially-Evolving Instability.- Linear Spirals in the Finite Couette-Taylor Problem.- Control of the Vortical Structure in the Early Stages of Transition in Boundary Layers.- On the Numerical Simulation of Spatial Disturbances in a Blunt-Nose Flat Plate Flow.- Group Summary: Transition Modeling.- Comparison of Two Transition Models.- Application of the Algebraic RNG Model for Transition Simulation.- Application of Renormalization Group Theory to the Large-Eddy Simulation of Transitional Boundary Layers.