Advances in Turbulence: Proceedings of the First European Turbulence Conference Lyon, France, 1–4 July 1986Genevieve Comte-Bellot, J. Mathieu Since 1964 the main function of the European Mechanics Committee has been to arrange Euromech Colloquia. These are three- or four-day meetings for the discussion of current research on a specified and relatively narrow topic in mechanics, by about 50 specialists chosen for their active involvement in research in that topic. The organization of each Euromech Colloquium is entrusted by the Committee to one or two selected scientists of repute in the field, and these organizers are enjoined to achieve a friendly and informal forum for discussion, with a minimum of paper work and expenditure. Over 220 Euromech Colloquia have been held since 1964 (about 40 each in France, West Germany and Britain and the remainder in 18 countries in both western and eastern Europe) on a wide range of topics drawn from the mechanics of solid materials, hydrodynamics, gas dynamics and mechanical systems. The Committee believes that collectively, Euromech Colloquia have made a significant contribution to the exchange of ideas on topics in mechanics within Europe and have thereby helped to overcome the barriers to easy scientific communication in that sorely divided continent. A few years ago the European Mechanics Committee turned its atten tion to the possible need for European conferences on a larger scale than Euromech Colloquia. |
Contents
Instability and Transition By J T Stuart | 2 |
Dynamical Instabilities and Transition to Turbulence in Spherical | 16 |
On Transition to Turbulence in Boundary Layers | 27 |
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amplitude attractor average behaviour bifurcation boundary layer bursts calculated CEDEX coefficients coherent structures computed convection correlation corresponding cylinder dimensional dissipation disturbance downstream dynamics effect enstrophy entrainment equations evolution experimental experiments Figure Fluid Mech Fourier frequency function gradient grid homogeneous hot-wire initial instability interaction kinetic energy laminar large eddy Large Eddy Simulation large scale LEBU linear magnetic mean velocity measurements mixing layer modes motion Navier-Stokes equations near-wall nonlinear observed obtained oscillations parameter particles phase Phys plane plate Poincaré section Poiseuille flow present probe ratio region Reynolds number Reynolds stress rotation sensor shear flows shear layer shear stress shown in Fig signal simulation skin friction solution spanwise spatial spectra spectrum streamwise technique temperature three-dimensional transition triad turbulent boundary layer turbulent flow Turbulent Shear Flows two-dimensional values vector velocity field velocity fluctuations viscosity vortex vorticity wave number wavenumber wire