Results 81 to 90 of about 29,809 (206)

Analysis of a parallel multigrid algorithm [PDF]

The parallel multigrid algorithm of Frederickson and McBryan (1987) is considered. This algorithm uses multiple coarse-grid problems (instead of one problem) in the hope of accelerating convergence and is found to have a close relationship to traditional
Chan, Tony F., Tuminaro, Ray S.
core   +1 more source

Application of Graphics Processor Unit Computing Resources to Solution of Incompressible Fluid Dynamics Problems

Computers
The structure and memory organization of graphics processor units (GPUs) manufactured by NVIDIA and the use of CUDA programming technology to solve computational fluid dynamics (CFD) problems is reviewed and discussed.
Redha Benhadj-Djilali, Arturas Gulevskis, Konstantin Volkov   +2 more
doaj   +1 more source

Numerical two-dimensional thermal analysis of the human skin using the multigrid method

Acta Scientiarum: Technology, 2019
Heat can be used as an adjuvant treatment of many diseases and also as a powerful tool to help diagnose cancers, with the advantage to be a noninvasive exam.
Gylles Ricardo Stroher, Cosmo Damião Santiago   +1 more
doaj   +1 more source

Convergence Analysis of the Fast Subspace Descent Methods for Convex Optimization Problems

, 2019
The full approximation storage (FAS) scheme is a widely used multigrid method for nonlinear problems. In this paper, a new framework to design and analyze FAS-like schemes for convex optimization problems is developed.
Chen, Long, Hu, Xiaozhe, Wise, Steven M.
core  

Magnetic Modeling of Magnetic Levitation Systems Based on a Fast Finite Difference Method

IEEE Access
An accurate magnetic force model is crucial for the high-precision control of magnetic levitation systems. Soft magnetic materials, renowned for their excellent magnetic properties, are commonly employed in these systems.
Yibo Wang, Wei Pang, Xianze Xu, Fengqiu Xu   +3 more
doaj   +1 more source

Comparison of Algebraic Multigrid Preconditioners for Solving Helmholtz Equations

Journal of Applied Mathematics, 2012
An algebraic multigrid (AMG) with aggregation technique to coarsen is applied to construct a better preconditioner for solving Helmholtz equations in this paper.
Dandan Chen, Ting-Zhu Huang, Liang Li
doaj   +1 more source

Multigrid solution of the Euler equations on unstructured and adaptive meshes [PDF]

A multigrid algorithm has been developed for solving the steady-state Euler equations in two dimensions on unstructured triangular meshes. The method assumes the various coarse and fine grids of the multigrid sequence to be independent of one another ...
Jameson, Antony, Mavriplis, Dimitri
core   +1 more source

Inverse Problem for the Nonlinear Convection–Diffusion Equation by Using the Multigrid Method and Constraint Data

Mathematics
In the article, we propose a combination method based on the multigrid method and constraint data to solve the inverse problem in the context of the nonlinear convection–diffusion equation in the multiphase porous media flow. The inverse problem consists
Shuai Wang, Shiyi Ling, Heyang Chao, Yunfei Qi, Wenwen Zhang, Qiang Ma, Tao Liu   +6 more
doaj   +1 more source

A diagonally inverted LU implicit multigrid scheme for the 3-D Navier-Stokes equations and a two equation model of turbulence [PDF]

An LU implicit multigrid algorithm is developed to calculate 3-D compressible viscous flows. This scheme solves the full 3-D Reynolds-Averaged Navier-Stokes equation with a two-equation kappa-epsilon model of turbulence. The flow equations are integrated
Yokota, Jeffrey W.
core   +1 more source

Richardson Cascadic Multigrid Method for 2D Poisson Equation Based on a Fourth Order Compact Scheme

Journal of Applied Mathematics, 2014
Based on a fourth order compact difference scheme, a Richardson cascadic multigrid (RCMG) method for 2D Poisson equation is proposed, in which the an initial value on the each grid level is given by the Richardson extrapolation technique (Wang and Zhang
Li Ming, Li Chen-Liang
doaj   +1 more source