Results 11 to 20 of about 6,268 (222)

Multigrid method for noncoercive parabolic variational inequality [PDF]

Journal of Inequalities and Applications
In this article, our work is focused on the proof of the uniform convergence of the multigrid method for parabolic variational inequality with a noncoercive operator and its numerical solution.
Mostafa Bahi, Mohammed Beggas, Mohamed Haiour, Salah Boulaaras   +3 more
doaj   +2 more sources

An adaptive-smoothing multigrid method for the Navier-Stokes equations [PDF]

, 2022
S.94-100The paper presents the development and investigation of an adaptive-smoothing (AS) procedure in conjunction with a full multigrid (FMG) - full approximation storage (FAS) method.
Drikakis, D., Iliev, O., Vassileva, D.
core   +1 more source

Overlapping Domain Decomposition Method with Cascadic Multigrid for Image Restoration

Mathematics, 2023
In the process of image restoration, it is usually necessary to solve large-scale inverse problems, where the computational cost is very high for large or high-resolution images.
Zhaoteng Chu, Chenliang Li
doaj   +1 more source

Multigrid methods for an elliptic optimal control problem with pointwise state constraints

Results in Applied Mathematics, 2023
We design multigrid methods for an elliptic distributed optimal control problem with pointwise state constraints. They are based on the P1 finite element method from Brenner et al.
Susanne C. Brenner, Sijing Liu, Li-yeng Sung   +2 more
doaj   +1 more source

Measuring the effectiveness of extrapolation techniques associated with the multigrid method applied to the Navier-Stokes equations

Acta Scientiarum: Technology, 2022
In this work, we applied different extrapolation techniques in association with the multigrid method to discover which one is the most effective in reducing the iteration error and the processing time (CPU time), as well as in improving the convergence ...
Bruno Benato Rutyna, Marcio Augusto Villela Pinto, Reverton Luis Antunes Neundorf, Marcio Alexandro Maciel Anunciação, Marcio André Martins   +4 more
doaj   +1 more source

Special issue on multigrid methods [PDF]

Computing and Visualization in Science, 2015
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Artem Napov, Yvan Notay, Stefan Vandewalle   +2 more
openaire   +3 more sources

A Geometric Multigrid Method for 3D Magnetotelluric Forward Modeling Using Finite-Element Method

Remote Sensing, 2023
The traditional three-dimensional (3D) magnetotelluric (MT) forward modeling using Krylov subspace algorithms has the problem of low modeling efficiency.
Xianyang Huang, Changchun Yin, Luyuan Wang, Yunhe Liu, Bo Zhang, Xiuyan Ren, Yang Su, Jun Li, Hui Chen   +8 more
doaj   +1 more source

An extrapolation full multigrid algorithm combined with fourth-order compact scheme for convection–diffusion equations

Advances in Difference Equations, 2018
In this paper, we propose an extrapolation full multigrid (EXFMG) algorithm to solve the large linear system arising from a fourth-order compact difference discretization of two-dimensional (2D) convection diffusion equations.
Ming Li, Zhoushun Zheng, Kejia Pan
doaj   +1 more source

Adaptive Multigrid Methods in MPI [PDF]

, 2000
Adaptive multigrid methods solve partial differential equations through a discrete representation of the domain that introduces more points in those zones where the equation behavior is highly irregular. The distribution of the points changes at run time in a way that cannot be foreseen in advance.
BAIARDI, FABRIZIO, Chiti S, Mori P, RICCI, LAURA EMILIA MARIA   +3 more
openaire   +2 more sources

A Nonlinear Multigrid Method for the Parameter Identification Problem of Partial Differential Equations with Constraints

Mathematics, 2022
In this paper, we consider the parameter identification problem of partial differential equations with constraints. A nonlinear multigrid method is introduced to the process of parameter inversion.
Tao Liu, Jiayuan Yu, Yuanjin Zheng, Chao Liu, Yanxiong Yang, Yunfei Qi   +5 more
doaj   +1 more source