Accession Number : ADP001007

Title :   Equidistant Mesh for Gas Dynamic Calculations,


Personal Author(s) : Ablow,C. M.

Report Date : 1982

Pagination or Media Count : 4

Abstract : This document states that the accuracy of finite difference solution of the differential equations of fluid flow is increased by fitting the mesh to flow boundaries and refining it where the solution has sharp variation. Fitting a mesh to flow boundaries is a subject of current research effort. Refinement in layers at the boundaries is readily accomplished in a boundary-fitting grid. The wave fronts and shocks of many gas dynamic flows present additional layers of sharp variation away from the boundaries. Before the benefits of mesh refinement in these regions can be obtained, simultaneous flow solution and grid adjustment are needed. A split calculation that alternates between steps of solution and steps of mesh improvement would be nearly as fast and easier to the split calculation. A properly refined mesh is obtained that fits a given solution function.

Descriptors :   *Gas dynamics, *Boundary layer flow, *Computations, *Finite difference theory, Differential equations, Accuracy, Fitting functions(Mathematics), Mesh, Variations, Fluid flow, Mach number

Distribution Statement : APPROVED FOR PUBLIC RELEASE