The Interaction of a Fluid Interface with a Vortex Pair
Abstract
A detailed parametric study of the variables critical to a numerical model of the interaction of a free surface with an ascending vortex pair has been carried out. The model is based on a discrete vortex representation of the free surface and the use of the appropriate boundary conditions. A study was performed to minimize the numerical Helmoltz instabilities inherent in the numerical model for lower Froude numbers. A method of free-surface re- discretization was developed and implemented. Additionally, an investigation of the motion of vortex pair approaching and passing through a sharp salt/ freshwater density interface was conducted. Experiments were performed in a large basin and the vortices were generated with two counter-rotating plates. The rise and intrusion of the Kelvin oval into the upper layer of lower density fluid was recorded on a video tape and then analyzed through the use of a motion analysis system. Keywords: Trailing vortices, Theses, Sinusoidal instability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1988
- Accession Number
- ADA200167
Entities
People
- Mark D. Petersen-overton
Organizations
- Naval Postgraduate School