Accession Number:

ADA179475

Title:

Error Norm Guided Flow Analysis.

Descriptive Note:

Rept. no. 1 (Final) 1 Mar 84-29 Apr 85,

Corporate Author:

BOEING MILITARY AIRPLANE CO SEATTLE WA

Personal Author(s):

Report Date:

1985-04-29

Pagination or Media Count:

26.0

Abstract:

A significant part of the present study has been the formulation of methods for defining definitive error norms. Extensive literature searches have been completed. Analytical problems have been formulated to pre-heat candidate error norms before they are implemented in computer codes. This approach has proved valuable in avoiding futile computer based experiments. We expect to see valuable 2-D results with trunkation error related error norms in future studies. Summary Report 1 discusses an elaborate 1-D eight grid level multigrid study to determine the minimum requirement for residual error control. This requirement is specified by the following ratio. It is the ratio of the sum of the absolute values of the residuals for all computational cells and the sum of the absolute values of the local truncation error estimates. It is called the residual contamination ratio. Summary Report 2 documents the implementation of one diagnostic error norm in 2-D for a co-flowing rocket nozzle plume and a Mach two free stream condition. The error norm of interest is the artificial diffusion terms in the local flux of mass, energy, and components of momentum.

Subject Categories:

  • Fluid Mechanics
  • Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE