Role of coherent structures in turbulent shear flows
Abstract
A definition for the large-scale coherent structure is presented, and the nature and role of coherent structures in turbulent shear flows are examined. The equations governing the coherent motions and the experimental considerations as well as constraints in the investigations of coherent structures in wall-bounded and free turbulent shear flows are discussed. Results from a few of our recent and on-going studies of coherent structures in excited and unexcited free turbulent shear flows are reviewed. These results show that coherent structures are dominant in transport in the early stages of their formation, but not in the self-preserving regions of turbulent shear flows.
- Publication:
-
Indian Academy of Sciences Proceedings: Section C Engineering Sciences
- Pub Date:
- August 1981
- Bibcode:
- 1981InES....4..129F
- Keywords:
-
- Flow Characteristics;
- Flow Equations;
- Fluid Mechanics;
- Shear Flow;
- Turbulent Flow;
- Axisymmetric Flow;
- Coherence;
- Flow Distribution;
- Free Flow;
- Taylor Instability;
- Turbulent Jets;
- Turbulent Mixing;
- Unsteady Flow;
- Vortices;
- Wall Flow;
- Fluid Mechanics and Heat Transfer