Studies on unsteady vortex motions including thermo-fluid interactions
An inviscid unsteady vortex dynamics study is presented to study the flow details in several free and bounded shear flows. The specific flows considered are the starting vortex behind sharp edges, the vortex street behind bluff-body wakes, the plane-mixing layers between two streams, and the wall bounded vortex street. Using the unsteady vortex dynamics models developed for each of these flows, and through the Lagrangian dynamics computational approach, the streakline and pathline pattern were computed for these flows. From the combined study of the computed streakline and pathline pattern, various flow-visualization details and the illusions created by the streaklines were identified and explained. With the accuracy of the unsteady vortex model for the vortex street wake having been verified by the good agreement obtained between the computed and flow visualization results, the model was used to investigate the different flow interactions present in this complex flow. This computational study highlights the important inviscid entrainment effects of convecting vortices by showing that the eruption-like appearance of the wall-layer streaklines observed in the flow visualization pictures is predominantly due to the inviscid entrainment effects and not merely caused by the viscous effects.
- Research Organization:
- Tennessee Univ., Knoxville (USA)
- OSTI ID:
- 5885396
- Resource Relation:
- Other Information: Thesis (Ph. D)
- Country of Publication:
- United States
- Language:
- English
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