Following a suggestion by the Gesellschaft fur Angewandte Mathematik und Mechanik (GAMM) the International Union of Theoretical and Applied Mecha nics (IUTAM) decided to sponsor a Symposium on "Laminar-Turbulent Tran sition". Originally planned to be held in Oberwolfach, where the number of participants would have had to have been rather limited, the overwhelming response to the first announcement made it clear that the larger facili ties at the University of Stuttgart would be more appropriate. The Scientific Committee decided that the Symposium should concentrate on fundamental mechanisms of the transition process. With this limited scope it was hoped to facilitate an easy exchange of ideas and to enable fruit ful discussions. The Symposium consisted of eight invited lectures in ad dition to 34 contributed papers solicited by a Call for Papers. With this Call for Papers it was intended to encourage participation of yet unknown researchers in this field and to insure that all innovative work would be included.

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Session 1 Chairman: R. Eppler.- Stability and Transition: Some Comments on the Problems.- On Wave Packets in Laminar Boundary Layers.- Further Observations on Transition in a Pipe.- Laminar Turbulent Transition in Pipe Flow: Development and Structure of the Turbulent Slug.- Session 2 Chairman: K. Stewartson.- An Experimental Investigation of the Secondary Instability.- Dialogue on Bridging Some Gaps in Stability and Transition Research.- Flow Field and Energy Balance According to the Spatial Linear Stability Theory of the Blasius Boundary Layer.- Linear Stability Theory for Wave-Packet Disturbances in Parallel and Nearly Parallel Flows.- Local Criteria of Hydrodynamic Stability.- Session 3 Chairman: P.S. Klebanoff.- The Transition Mechanism of an Oscillating Boundary Layer.- Longitudinal Vortices in a Transitioning Boundary Layer.- Experimental Study of Boundary Layer Waves at Large Amplitudes.- Experiments on the Stability of Nonlinear Waves in a Boundary Layer.- Experiments on Nonlinear Interaction of Waves in Boundary Layer.- Session 4 Chairman: M. Landahl.- Numerical Studies of Transition in Planar Shear Flows.- On the Non-Linear Evolution of Critical Layers.- Investigation of Nonlinear, Spatial Disturbance Amplification in Plane Poiseuille Flow.- Stability of the Laminar Boundary Layer on a Blunted Plate in Supersonic Flow.- Session 5 Chairman: J.T. Stuart.- Three-Dimensional Stability of Growing Boundary Layers.- Boundary-Layer Transition: Theory and Experiment.- On the Stabilization of Three-Dimensional Boundary Layers by Suction and Cooling.- Three-Dimensional Waves in a Boundary Layer.- On the Prediction of Transition in Three-Dimensional Flows.- Three-Dimensional Boundary Layer Transition via the Mechanisms of Attachment Line Contamination and CrossFlow Instability.- Session 6 Chairman: M.A.S. Ross.- Some Thoughts on Boundary-Layer Transition.- Interactions for Regular Patterns of Turbulent Spots in a Laminar Boundary Layer.- Visualization of Turbulent Spots in the Boundary Layer along a Flat Plate in a Water Flow.- A Visual Study of the Growth and Entrainment of Turbulent Spots.- Temperature Tagging Measurements of Turbulent Spots in a Heated Laminar Boundary Layer.- Session 7 Chairman: W.S. King.- Leading Edge Effect in Laminar Boundary Layer Excitation by Sound.- The Generation of a Tollmien-Schlichting Wave by a Sound Wave.- Delay of Turbulent Transition by Surface Heating in Water.- Observations of Transition on some Axisymmetric Bodies.- Session 8 Chairman: J. Zierep.- Successive Bifurcation and Turbulence.- Laminar-Turbulent Transition in Taylor-Couette Flow.- Laminar-Turbulent Transition in a Circular Couette Flow.- Sudden Transition to Turbulence.- Transition from Laminar to Turbulent Taylor Vortex Flow.- On Bifurcation of Stable Periodic Flows in an Ekman Layer and in a Convection Boundary Layer.- Session 9: Chairman: W. Criminale.- Taylor Vortices in Spherical Gaps.- Laminar-Turbulent Transition in a Spherical Annulus.