Growth of turbulent spots in plane Poiseuille flow
Abstract
The growth of small-scale-turbulence spots in plane Poiseuille flow (at Reynolds numbers below the the critical values predicted by linear theory) by three-dimensional secondary instabililty of leading-edge oblique waves is investigated theoretically on the basis of the experimental observations of Carlson et al. (1982). A model involving the cyclic interaction of moving regions of mass-flow blocking, waves arising from steady travelling disturbances, and the three-dimensional secondary instability of these waves is proposed, and the results of model computations are found to be in qualitative agreement with the experimental data. Sample spot visualizations, diagrams, and graphs are provided.
- Publication:
-
Turbulence and Chaotic Phenomena in Fluids
- Pub Date:
- 1984
- Bibcode:
- 1984tcpf.proc...93W
- Keywords:
-
- Flow Stability;
- Flow Visualization;
- Laminar Flow;
- Transition Flow;
- Turbulent Flow;
- Two Dimensional Flow;
- Leading Edges;
- Mass Flow;
- Reynolds Number;
- Wave Fronts;
- Wave Packets;
- Fluid Mechanics and Heat Transfer