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Об одном итерационном методе для смешанных схем конечных элементов

Об одном итерационном методе для смешанных схем конечных элементов

Abstract

Предлагается и исследуется итерационный метод с седловым предобуславливателем для решения системы нелинейных уравнений, возникающей при аппроксимации квазилинейного эллиптического уравнения второго порядка при помощи смешанной схемы конечных элементов типа Равьяра-Тома. Указываются способы выбора итерационного параметра, обеспечивающие сходимость метода. Приводятся результаты численных экспериментов.This article proposes and investigates an iterative method with a saddle preconditioner for solving a system of nonlinear equations that arises in the approximation of a quasilinear second-order elliptic equation with a mixed scheme of finite elements of Raviart-Thomas type. The ways of choosing iteration parameters to ensure convergence of the method are indicated. The results of numerical experiments are presented.

Keywords

КВАЗИЛИНЕЙНОЕ ЭЛЛИПТИЧЕСКОЕ УРАВНЕНИЕ ВТОРОГО ПОРЯДКА, СМЕШАННЫЙ МЕТОД КОНЕЧНЫХ ЭЛЕМЕНТОВ, ИТЕРАЦИОННЫЙ МЕТОД, СЕДЛОВАЯ МАТРИЦА, ИССЛЕДОВАНИЕ СХОДИМОСТИ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold