Results 81 to 90 of about 6,260 (222)

Distributed Memory Implementation of Multigrid Methods for Groundwater . . .

open access: yes, 1996
In this paper we present parallel solvers for large linear systems arising from the finite--element discretization of three--dimensional groundwater flowproblems.Wehavetestedourparallelimplementations on the Intel Paragon XP/S 150 supercomputer using up ...
G. Mahinthakumar   +3 more
core  

Multigrid Finite Element Method in Calculation of 3D Homogeneous and Composite Solids [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2016
In the present paper, a method of multigrid finite elements to calculate elastic three-dimensional homogeneous and composite solids under static loading has been suggested. The method has been developed based on the finite element method algorithms using
A.D. Matveev
doaj  

OVERLAPPING MULTIGRID METHODS AS AN EFFICIENT APPROACH FOR SOLVING THE BLACK-SCHOLES EQUATION

open access: yesQuantitative Methods in Economics, 2015
In this paper the modification of a two-level multigrid method by allowing an overlap between adjacent subdomains and its application to a one-dimensional Black-Scholes equation is described.
Michał Bernardelli
doaj  

A parallelizable method for two-dimensional wave propagation using subdomains in time with Multigrid and Waveform Relaxation

open access: yesActa Scientiarum: Technology
In this paper we compare the implicit schemes for the solution of the two-dimensional wave equation using Singlegrid and Multigrid methods. The discretization is performed using the Finite Difference Method, weighted in time by an established parameter.
Maicon Felipe Malacarne   +2 more
doaj   +1 more source

A multigrid method based on incomplete Gaussian elimination [PDF]

open access: yes, 1995
In this paper we introduce and analyse a new Schur complement approximation based on incomplete Gaussian elimination. The approximate Schur complement is used to develop a multigrid method.
Reusken, Arnold   +2 more
core   +1 more source

Robust V-cycle multigrid method for anisotropic linear elasticity problems

open access: yes四川大学学报. 自然科学版, 2019
A Robust V-cycle multigrid method is constructed for the linear system arising from the bilinear finite element discretization of anisotropic linear elasticity equations. By using the Xu-Zikatanov (XZ) identity, quasi-optimal convergence of the method is
BAI Yan-Hong, WU Yong-Ke, QIN Yan-Mei
doaj  

Bi-Conjugate Gradient Stabilized and Multigrid Approaches Based on Nonstandard Finite Differences for the Solution of Elliptic Partial Differential Equations [PDF]

open access: yesAlfarama Journal of Basic & Applied Sciences
This study introduces a robust and highly accurate numerical scheme for the solution of two-dimensional elliptic partial differential equations subject to Dirichlet boundary conditions.
N. H. Sweilam   +3 more
doaj   +1 more source

Algebraic Multigrid method of Kaczmarz method

open access: yes, 2007
We are concerned with the algebraic multigrid (AMG) method for least square problem arisen from image restorations. We employ the Kaczmarz’s method as the smoothers for the AMG and prove the corresponding smoothing property.Abstract vii 1 Introduction 1 ...
林有慶, Lin, Yu-Chin
core  

Efficiency Improvements of RANS-Based Analysis and Optimization using Implicit and Adjoint Methods on Unstructured Grids

open access: yes, 2006
The efficiency of an unstructured grid finite volume RANS solver is signicantly improved using two implicit methods based on diering philosophies. The LU-SGS multigrid method aims to improve performance, while maintaining the low memory requirements and
Dwight, Richard
core  

DG P-Multigrid. Efficient Solvers and Complex Applications

open access: yes, 2009
These lecture notes will focus on some efficiency-related topics relevant to an effective implementation of the p-multigrid technique, presented in the lecture notes “p-Multigrid For Discontinuous Galerkin Methods”, in a high-order DG method.
REBAY, Stefano   +2 more
core   +1 more source

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