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Numerical simulation of viscous vortex ringsVortex interactions and their role in turbulent flow are examined. The objectives are twofold. First, to use the existing axisymmetric code to study the annihilation process of colliding vortex rings and determine the relevance of this problem to similar 3-D phenomena. The second objective is to extend the code to three dimensions. The code under development is unique in that it can compute flows in a truly infinite domain (i.e., without periodic boundary conditions or approximations from truncating the domain). Because of this, the far field sound can be computed, and therefore, contribute to improved models of turbulence generated noise for this class of flows. Issues which can be addressed by the code include: effects of viscosity on mode selection in azimuthal breakdown of vortex rings (i.e., the Widnall instability); reconnection, the associated production of small scales, and the time scale of the process.
Document ID
19890013453
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Stanaway, Sharon Kay (Stanford Univ. CA, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1989
Publication Information
Publication: Annual Research Briefs, 1988
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
89N22824
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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