Experimental and numerical study of vortex interaction
Abstract
Mutual interactions of succeeding vortex rings along an axis and the crosslinking and merging phenomena of two vortex rings are investigated. In the first part of the study several vortex rings were ejected in series along the same axis into still air through a circular orifice. A discrete-vortex numerical method in which each vortex is represented by a finite number of vortex filaments is used to simulate this process. A time-dependent variation of each discretized vortex is conducted. Secondly, two vortex rings were simultaneously ejected from two identical circular orifices, and the merging, splitting, and interchanging of the rings were observed. A three-dimensional discrete-vortex method in which each vortex filament is divided into a number of vortex segments is used to simulate the crosslinking of vortex filaments. Viscous dissipation is accounted for. The proposed method effectively simulated the turbulent diffusion of vorticity.
- Publication:
-
17th Fluid Dynamics, Plasma Dynamics, and Lasers Conference
- Pub Date:
- June 1984
- Bibcode:
- 1984fdpd.confQ....O
- Keywords:
-
- Computational Fluid Dynamics;
- Orifice Flow;
- Turbulent Flow;
- Vortex Filaments;
- Vortex Rings;
- Flow Visualization;
- Interactions;
- Numerical Flow Visualization;
- Two Dimensional Flow;
- Fluid Mechanics and Heat Transfer