Study of the origin of three dimensional structures and chaos in an externally forced free shear layer
Abstract
Experiments on an externally forced free shear layer are performed which study the origin of three-dimensional structures and chaos in shear flows. Two avenues of investigation are pursued. First, the general idea of a multifrequency route to chaos is examined which treats the shear flow as an open dynamical system. An attempt is made to apply concepts from nonlinear dynamics to these systems. Secondly, a new approach to generating three-dimensional structures in shear flows which involves the creation of a spatial shear in the frequency of external perturbations is presented. In these experiments, a variety of vortex reconnection behaviors is observed at the discontinuity.
- Publication:
-
AIAA, 2nd Shear Flow Conference
- Pub Date:
- March 1989
- Bibcode:
- 1989shfl.confU....W
- Keywords:
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- Chaos;
- Shear Layers;
- Three Dimensional Flow;
- Flow Visualization;
- Mixing Layers (Fluids);
- Power Spectra;
- Shear Flow;
- Transition Flow;
- Fluid Mechanics and Heat Transfer