Accession Number : ADP000994

Title :   Generation of Boundary-Fitted Coordinate Systems Using Segmented Computational Regions,


Personal Author(s) : Coleman,Roderick M.

Report Date : 1982

Pagination or Media Count : 19

Abstract : INMESH is a computer program for the generation of two-dimensional boundary-fitted coordinate systems which allows the creation of an unlimited number of different types of meshes. This general program enables the user to design a mapping configuration suitable for even the most complicated geometric domains including those with multiple-connectedness. This versatility is achieved through the use of segmented computational regions tailored to handle the topological complexities of each individual problem. The proper choice of mapping configuration is particularly important for problems which contain two or more boundaries of different shapes, especially if these boundaries vary with time. Several computer programs have been written such as TOMCAT and GRAPE which allow the user to automatically generate a boundary-fitted coordinate system for a given geometry with some control over the distribution of the coordinate lines. These problems, however, are limited to certain predetermined mapping configurations. IMESH is not restricted in this manner and thus some of the previously-experienced need for coordinate system control has been eliminated. Its modular construction makes INMESH a convenient and efficient tool not only for the generation of curvilinear coordinate systems, but also for the numerical solution of partial differential equations using those coordinate systems. (Author)

Descriptors :   *Computer programs, *Grids(Coordinates), Mapping, Configurations, Mesh, Computations, Two dimensional, Numerical analysis, Partial differential equations, Geometry, Fitting functions(Mathematics), Boundaries, Transformations(Mathematics)

Distribution Statement : APPROVED FOR PUBLIC RELEASE