Accession Number : ADA129482


Title :   A boundary-Fitted Coordinate Code for General Two-Dimensional Regions with Obstacles and Boundary Intrusions.


Descriptive Note : Final rept. Jun 78-May 82,


Corporate Author : MISSISSIPPI STATE UNIV MISSISSIPPI STATE DEPT OF AEROPHYSICS AND AEROSPACE ENGINEERING


Personal Author(s) : Thompson,Joe F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a129482.pdf


Report Date : Mar 1983


Pagination or Media Count : 85


Abstract : A code (WESC0R) for the generation of boundary-fitted coordinate systems for general two-dimensional regions with boundaries of arbitrary shape and with internal obstacles and boundary intrusions, arbitrary in shape and number, is described and instructions for input and use are given. The coordinate system is generated from the numerical solution of a system of elliptic partial differential equations with provision for controlling the spacing of the coordinate lines in the field. The transformed (computational) region is rectangular with the obstacles and intrusions transformed to slits and/or slabs. A small code to distribute points on various fundamental curves with exponential concentration is also described. This front-end code can be used to construct boundary point distributions for input to the coordinate code. A plot code for the coordinate system is also included. The boundary-fitted coordinate systems generated by this code may be used as a basis for the numerical solution of partial differential equations for any physical problem of interest. This procedure will be particularly useful where numerical models are used to analyze flow problems with complex boundary conditions. Typical examples are riverine analysis or the design and evaluation of selective withdrawal outlet works. (Author)


Descriptors :   *COMPUTER PROGRAMS , *BOUNDARY VALUE PROBLEMS , *COORDINATES , NUMERICAL ANALYSIS , FINITE DIFFERENCE THEORY , DIFFERENTIAL EQUATIONS , COMPUTER APPLICATIONS


Subject Categories : Numerical Mathematics


Distribution Statement : APPROVED FOR PUBLIC RELEASE