The flow external to a rotating torus
| Autor: | Sophie A. W. Calabretto, Trent W. Mattner, James P. Denier |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Jet (fluid) General Engineering Computational Mechanics Reynolds number Geometry Torus Viscous liquid Condensed Matter Physics Rotation 01 natural sciences Instability 010305 fluids & plasmas Vortex ring Physics::Fluid Dynamics symbols.namesake Boundary layer 0103 physical sciences symbols 010306 general physics |
| Zdroj: | Theoretical and Computational Fluid Dynamics. 30:295-312 |
| ISSN: | 1432-2250 0935-4964 |
| Popis: | Imparting a sudden rotation to a torus (or other symmetric smooth object) in an otherwise quiescent, viscous fluid serves to generate boundary layers at the object’s surface. These boundary layers are known to exhibit a finite-time singularity at the equator which manifests in a thickening of the boundary layer and subsequent development of an equatorial jet. Here we consider the post-collision flow dynamics, demonstrating that the equatorial jet serves to shed a finite amplitude toroidal vortex pair. The radial jet is also shown to develop an absolute instability at suitably high Reynolds numbers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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