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  • 1975-1979  (3)
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  • 1
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    Automatic mesh-point clustering near a boundary in grid generation with elliptic partial differential equations (1979)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Elliptic partial differential equations are used to generate a smooth grid that permits a one-to-one mapping in such a way that mesh lines of the same family do not cross. Problems that arise due to lack of clustering at crucial points or intersections of mesh lines at highly acute angles, are examined and various forcing or source terms are used (to correct the problems) that are either compatible with the maximum principle or are so locally controlled that mesh lines do not intersect. Attention is given to various schematics of unclustered grids and grid detail about (highly cambered) airfoils.
    Keywords: NUMERICAL ANALYSIS
    Type: Journal of Computational Physics; 33; Dec. 197
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Internal and external axial corner flows (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The inviscid, internal, and external axial corner flows generated by two intersecting wedges traveling supersonically are obtained by use of a second-order shock-capturing, finite-difference approach. The governing equations are solved iteratively in conical coordinates to yield the complicated wave structure of the internal corner and the simple peripheral shock of the external corner. The numerical results for the internal flows compare favorably with existing experimental data.
    Keywords: AERODYNAMICS
    Type: Aerodynamic Analyses Requiring Advanced Computers, Pt. 1; p 643-658
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Simplified clustering of nonorthogonal grids generated by elliptic partial differential equations (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A simple clustering transformation is combined with the Thompson, Thames, and Mastin (TTM) method of generating computational grids to produce controlled mesh spacings. For various practical grids, the resulting hybrid scheme is easier to apply than the inhomogeneous clustering terms included in the TTM method for this purpose. The technique is illustrated in application to airfoil problems, and listings of a FORTRAN computer code for this usage are included.
    Keywords: NUMERICAL ANALYSIS
    Type: NASA-TM-73252 , A-6950
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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