Accession Number:

ADA256623

Title:

Spurious Modes in Spectral Collocation Methods with Two Non-Periodic Directions

Descriptive Note:

Contractor rept.

Corporate Author:

INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s):

Report Date:

1992-09-01

Pagination or Media Count:

12.0

Abstract:

Collocation implementation of the Kleiser-Schumanns method in geometries with two non-periodic directions is shown to suffer from three spurious modes--line, column and checkerboard--contaminating the computed pressure field. The corner spurious modes are also present but they do not affect evaluation of pressure related quantities. A simple methodology in the inversion of the influence matrix will efficiently filter out these spurious modes. Spectral methods Spurious modes.

Subject Categories:

  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE