Numerical analysis of single-vortex/free-surface interaction
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Authors
Merrill, Craig F.
Subjects
CFD
Trailing Vortices
Scars
Surface Disturbances
Trailing Vortices
Scars
Surface Disturbances
Advisors
Sarpkaya, Turgut
Date of Issue
1993-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The interaction of a single Lamb vortex with a free surface is analyzed numerically through the use of a finite-difference technique. The individual effects of gravity, viscosity, and surface tension are investigated within the range of the applicability of the phenomenon and the code used. The vortex is allowed to build up to its full strength in a relatively small time and then the evolution of the free surface, streamlines, and other details of the flow are calculated. The results have shown that the smaller the proximity of the vortex to the free surface, the larger the scar produced on its down-wash side. The effect of the surface tension is to reduce the amplitude of the free surface elevation. The viscous effects appear to be relatively small even though the calculations are, out of necessity, confined to a limited range of the governing parameters, as in all finite difference calculations
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering and Mechanical Engineer
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
75 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.