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Record 1 of 614
Interaction and merging of vortex filaments
Author and Affiliation:
Liu, C. H.(NASA Langley Research Center, Hampton, VA, United States)
Weston, R. P.(NASA Langley Research Center, Hampton, VA, United States)
Ishii, K.(Institute of Computational Fluid Dynamics, Tokyo, Japan)
Ting, L.(New York University, NY, United States)
Visintainer, J. A.(NASA Langley Research Center, Hampton, VA, United States)
Abstract: The asymptotic solutions of Navier-Stokes equations for vortex filaments of finite strength with small effective vortical cores are summarized with special emphasis placed on the physical meaning and the practical limit to the applicability of the asymptotic solution. Finite-difference solutions of Navier-Stokes equations for the marging of the filament(s) are described with a focus on the development of the approximate boundary conditions for the computational domain. An efficiency study employing a model problem is used to assess the advantages of the present approximate boundary condition method over previously used techniques. Applications of the present method are presented for the motion and decay of a 3:1 elliptic vortex ring, and for the merging process of a pair of coaxial vortex rings. A numerical procedure for the problem of local merging of vortex filaments, which requires the asymptotic analysis as well as the numerical Navier-Stokes solver, is also presented.
Publication Date: Jan 01, 1988
Document ID:
19880061568
(Acquired Nov 28, 1995)
Accession Number: 88A48795
Subject Category: FLUID MECHANICS AND HEAT TRANSFER
Report/Patent Number: AIAA PAPER 88-3570
Document Type: Conference Paper
Publication Information: (SEE A88-48776)
Publisher Information: United States
Meeting Information: AIAA, ASME, SIAM, and APS, National Fluid Dynamics Congress; 1st; July 25-28, 1988; Cincinnati, OH; United States
Financial Sponsor: NASA; United States
Organization Source: NASA Langley Research Center; Hampton, VA, United States
New York Univ.; New York, NY, United States
Description: 11p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ASYMPTOTIC METHODS; NAVIER-STOKES EQUATION; VORTEX FILAMENTS; VORTICITY; BOUNDARY CONDITIONS; BOUNDARY VALUE PROBLEMS; COMPUTATIONAL FLUID DYNAMICS; FINITE DIFFERENCE THEORY; NUMERICAL INTEGRATION
Imprint And Other Notes: IN: AIAA, ASME, SIAM, and APS, National Fluid Dynamics Congress, 1st, Cincinnati, OH, July 25-28, 1988, Technical Papers. Part 1 (A88-48776 20-34). Washington, DC, American Institute of Aeronautics and Astronautics, 1988, p. 138-148.
Availability Source: Other Sources
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