Accession Number : ADA113769

Title :   Another Strategy for Fast 'Poisson' Solving with Non-Constant Coefficients.

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Boris,J P

PDF Url : ADA113769

Report Date : 09 Apr 1982

Pagination or Media Count : 8

Abstract : The key to fast Poisson solving in an extended domain is nonlocal residual error dispersal. The fastest, most stable iterations are obtained when 'most' of the nonconstant-coefficient elliptic operator can be inverted implicitly . Although local inversion approaches (ICCG, SOR, etc.) are workable, there are good incentives to seek computationally inexpensive nonlocal techniques whose worst case convergence is expected to be far better than for local inverse techniques. This note presents one such approach for a useful class of variable coefficient problems. (Author)

Descriptors :   *Poisson equation, *Coefficients, Strategy, Fourier transformation, Errors, Iterations, Inversion, Variables, Finite difference theory, Two dimensional, Global, Dispersing, Residuals, Algorithms, Stability

Subject Categories : Theoretical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE