Results 21 to 30 of about 80 (76)

PARALLEL IMPLEMENTATIONS OF THE FAST SWEEPING METHOD

open access: yes, 2008
. The fast sweeping method is an efficient iterative method for hyperbolic problems. It combines Gauss-Seidel iteration with alternating sweeping ordering. In this paper several parallel implementations of the fast sweeping method are presented.
Hongkai Zhao
core  

Necessary Conditions for Uniform Convergence of Finite Difference Schemes for Convection-Diffusion Problems With Exponential and Parabolic Layers [PDF]

open access: yes, 1995
summary:Singularly perturbed problems of convection-diffusion type cannot be solved numerically in a completely satisfactory manner by standard numerical methods. This indicates the need for robust or $\epsilon $-uniform methods.
Hans-Görg Roos   +3 more
core   +1 more source

A multiple-patch phase space method for computing trajectories on manifolds with applications to wave propagation problems

open access: yes, 2007
. We present a multiple-patch phase space method for computing trajectories on two-dimensional manifolds possibly embedded in a higher-dimensional space. The dynamics of tra-jectories are given by systems of ordinary differential equations (ODEs).
Olof Runborg   +3 more
core   +1 more source

A GENERAL CLASS OF FINITE-DIFFERENCE METHODS FOR THE LINEAR TRANSPORT EQUATION ∗

open access: yes, 2008
. A wide family of finite-difference methods for the linear advection equation, based on a six-point stencil, is presented. The family depends on three parameters and includes most of the classical linear schemes.
Daniele Funaro, Giuseppe Pontrelli
core  

An Accurate and Stable Multigrid Method for Convection-Diffusion Equations

open access: yes, 1995
: We introduce a high-order compact difference scheme with multigrid algorithm to solve the convection-diffusion equations with constant coefficients. This high-order discretization scheme is shown to be more accurate and stable than the usual five-point
Jun Zhang   +2 more
core  

Residual Scaling Techniques in Multigrid, I: Equivalence Proof

open access: yes, 1996
This paper addresses the residual scaling techniques (coarse-grid-correction optimization techniques) in multigrid methods. We survey recent developments in this area and prove the equivalence of the over-weighted residual technique and the over ...
Jun Zhang
core  

Convergence Proof of Jacobi Iterative Method for A Discretized 2D Convection-Diffusion Equation

open access: yes, 1998
We prove that the Jacobi iterative method converges from any initial values for solving the linear system resulting from a fourth-order compact finite difference discretization of the 2D convection-diffusion equation with constant convection coefficients.
Shiqing Zhang, Deyu Sang
core  

A Note On Immersed Interface Method For Three Dimensional Elliptic Equations

open access: yes, 1996
. The Immersed Interface Method proposed by LeVeque and Li [SIAM J. Numer. Anal. 31, No.4 (1994)] is extended to three dimensional elliptic equations of the form: r \Delta (fi(x)ru(x)) + (x)u(x) = f(x): We study the situation in which there is an ...
Zhilin Li
core  

Scattered Node Compact Finite Difference-Type Formulas Generated from Radial Basis Functions

open access: yes, 2008
In standard equispaced finite difference (FD) formulas, symmetries can make the order of accuracy relatively high compared to the number of nodes in the FD stencil. With scattered nodes, such symmetries are no longer available.
Grady B. Wright A, Bengt Fornberg B
core  

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