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PRECONDITIONED CONJUGATE-GRADIENT 2 (PCG2), a computer program for solving ground-water flow equations

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PRECONDITIONED CONJUGATE-GRADIENT 2 (PCG2), a computer program for solving ground-water flow equations; 1990; WRI; 90-4048; Hill, Mary C.

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This report documents PCG2 : a numerical code to be used with the U.S. Geological Survey modular three-dimensional, finite-difference, ground-water flow model . PCG2 uses the preconditioned conjugate-gradient method to solve the equations produced by the model for hydraulic head. Linear or nonlinear flow conditions may be simulated. PCG2 includes two reconditioning options : modified incomplete Cholesky preconditioning, which is efficient on scalar computers; and polynomial preconditioning, which requires less computer storage and, with modifications that depend on the computer used, is most efficient on vector computers . Convergence of the solver is determined using both head-change and residual criteria. Nonlinear problems are solved [...]

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Type Scheme Key
local-index unknown wri904048
local-pk unknown 27692
doi http://www.loc.gov/standards/mods/mods-outline-3-5.html#identifier doi:10.3133/wri904048
series unknown Water-Resources Investigations Report

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journalWater-Resources Investigations Report
edition-
languageENGLISH
citationTypeReport

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