On large coherent structures in two-dimensional turbulent wakes
Abstract
A systematic study of turbulent, small-deficit, planar wakes behind various wake generators was carried out to investigate the structure and the universality of their self-preserving states. The results indicate that the normalized characteristic velocity and length scales depend on the initial conditions while the shape of the normalized mean velocity profile is independent of initial conditions or the nature of the wake generator. The normalized distributions of the longitudinal turbulence intensity, however, are dependent on the initial conditions. Linear inviscid stability theory in which the divergence of the mean flow was taken into account predicts quite well the amplification and the transverse distributions of amplitudes and phases of externally imposed sinuous waves on a turbulent wake generated by a flat plate.
- Publication:
-
Turbulence and Chaotic Phenomena in Fluids
- Pub Date:
- 1984
- Bibcode:
- 1984tcpf.proc..403W
- Keywords:
-
- Flat Plates;
- Flow Velocity;
- Turbulent Wakes;
- Two Dimensional Flow;
- Flow Measurement;
- Flow Stability;
- Inviscid Flow;
- Sine Waves;
- Velocity Distribution;
- Fluid Mechanics and Heat Transfer