Results 21 to 30 of about 9,757 (303)

Adaptive time-stepping for incompressible flow. Part II: Navier-Stokes equations [PDF]

, 2010
We outline a new class of robust and efficient methods for solving the Navier–Stokes equations. We describe a general solution strategy that has two basic building blocks: an implicit time integrator using a stabilized trapezoid rule with an explicit ...
D.J. Silvester, Kay, David, Kay, David A., Kay, D.A., Silvester, D.J., Silvester, David J.; id_orcid, Griffiths, David F., D.A. Kay, Griffiths, David, Gresho, P.M., Gresho, PM, Silvester, David J., Silvester, DJ, Gresho, Philip M., Griffiths, D.F., P.M. Gresho, Griffiths, DF, D.F. Griffiths   +17 more
core   +1 more source

Application of a Sparsity Pattern and Region Clustering for Near Field Sparse Approximate Inverse Preconditioners in Method of Moments Simulations

International Journal of Antennas and Propagation, 2017
This document presents a technique for the generation of Sparse Inverse Preconditioners based on the near field coupling matrices of Method of Moments simulations where the geometry has been partitioned in terms of regions.
Carlos Delgado, Javier Moreno, Felipe Cátedra   +2 more
doaj   +1 more source

A splitting preconditioner for the incompressible navier–stokes equations

Mathematical Modelling and Analysis, 2013
In this paper, a splitting preconditioner based on the relaxed dimensional factorization (RDF) preconditioner and the modified augmented Lagrangian (MAL) preconditioner for the incompressible Navier–Stokes equations is presented.
Ze-Jun Hu, Ting-Zhu Huang, Ning-Bo Tan
doaj   +1 more source

Communication Avoiding ILU0 Preconditioner [PDF]

SIAM Journal on Scientific Computing, 2015
Summary: In this paper we present a communication avoiding ILU0 preconditioner for solving large linear systems of equations by using iterative Krylov subspace methods. Recent research has focused on communication avoiding Krylov subspace methods based on so-called \(s\)-step methods.
Grigori, Laura, Moufawad, Sophie
openaire   +2 more sources

A preconditioned iterative method for coupled fractional partial differential equation in European option pricing

Open Mathematics, 2023
Recently, regime-switching option pricing based on fractional diffusion models has been used, which explains many significant empirical facts about financial markets better.
Wu Shuang, Chou Lot-Kei, Chen Xu, Lei Siu-Long   +3 more
doaj   +1 more source

解非对称鞍点问题的广义交替分裂预处理子的一个注记(A note of generalized shift-splitting preconditioners for nonsymmetric saddle point problems)

Zhejiang Daxue xuebao. Lixue ban, 2017
Recently, CAO et al introduced a generalized shift-splitting preconditioner for saddle point problems with nonsymmetric positive definite (1, 1)-block.
ZHANGLitao(张理涛), GUTongxiang(谷同祥), MENGHuili(孟慧丽)   +2 more
doaj   +1 more source

A second-level diagonal preconditioner for single-step SNPBLUP

Genetics Selection Evolution, 2019
Background The preconditioned conjugate gradient (PCG) method is an iterative solver of linear equations systems commonly used in animal breeding. However, the PCG method has been shown to encounter convergence issues when applied to single-step single ...
Jeremie Vandenplas, Mario P. L. Calus, Herwin Eding, Cornelis Vuik   +3 more
doaj   +1 more source

Accelerating the Convergence of Multiphase Flow Simulations ‎when Employing Non-Uniform Structured Grids [PDF]

Journal of Applied and Computational Mechanics, 2021
Non-uniform grids inevitably arise in multiphase flow simulation scenarios due to the need to resolve near-wall phenomena and/or large L/D ratios associated with the reactor configuration.
Gautham Krishnamoorthy, Lauren Elizabeth Clarke, Jeremy Nicholas‎ Thornock   +2 more
doaj   +1 more source

Finite element analysis of multi-material models using a balancing domain decomposition method combined with the diagonal scaling preconditioner

Nihon Kikai Gakkai ronbunshu, 2015
Actual problems in science and industrial applications are modeled by multi-materials and large-scale unstructured mesh, and the finite element analysis has been widely used to solve such problems on the parallel computer.
Masao OGINO
doaj   +1 more source

A divergence-free method of collocations and least squares for the computation of incompressible fluid flows and its efficient implementation

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2020
The problem of the acceleration of the iterative process of numerical solution by the collocation and least squares (CLS) method of boundary value problems for partial differential equations is considered.
Evgenii Vasil'evich Vorozhtsov, Vasiliy Pavlovich Shapeev   +1 more
doaj   +1 more source