An oscillatory approach to turbulence
Abstract
Nature offers many examples of restrained fluid layers that an outer flow of velocity U forces to oscillate with a basic frequency approximately equal to 2 pid, where d is the layer thickness. When the oscillations are convected by the current, waves of length 2 pid are formed. Harmonics of the basic frequency and the corresponding fractional-length waves often arise. Taking into account the presence of those waves, an undulatory model for the turbulent flow is propounded. As an example of its application, a turbulent-energy spectrum is obtained through elementary wave-mechanics considerations.
- Publication:
-
Unsteady Turbulent Shear Flows
- Pub Date:
- 1981
- Bibcode:
- 1981utsf.proc..348L
- Keywords:
-
- Computational Fluid Dynamics;
- Oscillating Flow;
- Turbulent Boundary Layer;
- Wave Propagation;
- Boundary Layer Transition;
- Energy Spectra;
- Flow Velocity;
- Strouhal Number;
- Wall Flow;
- Fluid Mechanics and Heat Transfer