Mechanisms of Decay of Laminar and Turbulent Vortices.
Abstract
Dynamics of an infinitely long one-dimensional vortex and a swirl are compared with dynamics of a semi-infinitely long trailing vortex and trailing swirl. With increasing distance, the change in axial velocity difference between the core of the trailing-vortex and the surrounding region causes radial convection and some associated axial convection of angular momentum. In laminar or turbulent trailing vortices, this is the dominant mechanism for decrease in velocities of swirl in the core and corresponding growth of the core. Axial velocity difference between the core of the trailing-vortex and the surrounding region is necessary for the sustenance of turbulence in the vortex core. A theory of turbulent trailing-vortex is developed on the basis of these mechanisms and the results are compared with experimental observations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1977
- Accession Number
- ADA049176
Entities
People
- Mahinder S. Uberoi
Organizations
- Purdue University