Accession Number:

ADA175072

Title:

Closing Developments in Aerodynamic Simulation with Disjoint Patched Meshes.

Descriptive Note:

Final rept. 15 May 83-14 May 85,

Corporate Author:

PEDA CORP PALO ALTO CA

Report Date:

1986-08-25

Pagination or Media Count:

55.0

Abstract:

This research sought to provide computational tools and procedures as the building blocks for a system to permit efficient solution and hi8gh resolution capture of flow structure in gasdynamic problems of realistically complex geometries. the research yielded a comparatively simple algebraic procedure for constructing two and three dimensional geometry fitted base level composite meshes in quadrilateral patches. The method provides complete control of coordinate distribution and gradient on all patch boundaries which may include slope discontinuities. A robust upwind implicit method CSCM was the basis to solve the multidimensional pseudo time dependent Euler or compressible Navier-Stokes equations. Research into solution algorithms for that upwind method yielded a more robust diagonally dominant DDADI approximate factorization that subsequently led to a family of rapidly convergent and data storage and management efficient relaxation schemes in two and three space dimensions. Those operationally explicit and unconditionally stable upwind algorithms have led to a simple robust boundary procedure based on interpolation of conservative variable data from adjacent patches overlying interior patch boundaries where coordinates are discontinuous.

Subject Categories:

  • Theoretical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE