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A study of the effects of numerical dissipation on the calculation of supersonic separated flowsAn extensive investigation of the effect of numerical dissipation on the calculation of supersonic, separated flow over a rearward-facing step is carried out. The complete two-dimensional Navier-Stokes equations are solved by means of MacCormack's standard explicit, unsplit, time-dependent, finite difference method. A fourth-order numerical dissipation term is added explicitly. The magnitude of this term is progressively varied, and its consequences on the flowfield calculations are identified and studied. For a cold-wall, heat transfer case, numerical dissipation had a major effect on the results, particularly in the separated region. However, rather dramatically for an adiabatic wall case, numerical dissipation had virtually no effect on the results. The role of grid size on both the influence of numerical dissipation, and on the overall accuracy of the separated flow solutions is discussed.
Document ID
19850037499
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kuruvila, G.
(Maryland Univ. College Park, MD, United States)
Anderson, J. D., Jr.
(Maryland, University College Park, MD, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 85-0301
Accession Number
85A19650
Funding Number(s)
CONTRACT_GRANT: NCC1-41
Distribution Limits
Public
Copyright
Other

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