A closed‐form multigrid smoothing factor for an additive Vanka‐type smoother applied to the Poisson equation

C Greif, Y He - Numerical Linear Algebra with Applications, 2023 - Wiley Online Library
We consider an additive Vanka‐type smoother for the Poisson equation discretized by the
standard finite difference centered scheme. Using local Fourier analysis, we derive …

Novel mass-based multigrid relaxation schemes for the Stokes equations

Y He - Applied Mathematics and Computation, 2023 - Elsevier
In this work, we propose three novel block-structured multigrid relaxation schemes based on
distributive relaxation, Braess–Sarazin relaxation, and Uzawa relaxation, for solving the …

Exploiting mesh structure to improve multigrid performance for saddle-point problems

L Spies, L Olson, S MacLachlan - The International Journal …, 2024 - journals.sagepub.com
In recent years, solvers for finite-element discretizations of linear or linearized saddle-point
problems, like the Stokes and Oseen equations, have become well established. There are …

Monolithic algebraic multigrid preconditioners for the stokes equations

A Voronin, S MacLachlan, LN Olson… - arXiv preprint arXiv …, 2023 - arxiv.org
In this paper, we investigate a novel monolithic algebraic multigrid solver for the discrete
Stokes problem discretized with stable mixed finite elements. The algorithm is based on the …

A staggered discontinuous Galerkin method for the Stokes problem on rectangular meshes

HH Kim, GM Gie, CY Jung, TB Nguyen - Computers & Mathematics with …, 2024 - Elsevier
In this paper, staggered discontinuous Galerkin (SDG) approximation for the Stokes problem
is developed in a 2D square domain. The square domain is discretized by using rectangular …

Monolithic Multigrid Preconditioners for High-Order Discretizations of Stokes Equations

A Voronin, G Harper, S MacLachlan, LN Olson… - arXiv preprint arXiv …, 2024 - arxiv.org
This work introduces and assesses the efficiency of a monolithic $ ph $ MG multigrid
framework designed for high-order discretizations of stationary Stokes systems using Taylor …

On the efficient preconditioning of the Stokes equations in tight geometries

V Pimanov, O Iliev, I Oseledets… - … Linear Algebra with …, 2023 - Wiley Online Library
It is known (see, eg, SIAM J. Matrix Anal. Appl. 2014; 35 (1): 143‐173) that the performance
of iterative methods for solving the Stokes problem essentially depends on the quality of the …

A novel multigrid method for elliptic distributed control problems

Y He - Journal of Computational and Applied Mathematics, 2023 - Elsevier
Large linear systems of saddle-point type have arisen in a wide variety of applications
throughout computational science and engineering. The discretizations of distributed control …

Development and numerical study of efficient solvers for single-phase steady flows in tight porous media

V Pimanov - 2023 - kluedo.ub.rptu.de
Single-phase flows are attracting significant attention in Digital Rock Physics (DRP),
primarily for the computation of permeability of rock samples. Despite the active …

On a multigrid solver for stationary Navier–Stokes velocity–pressure tracking-type control problems

MM Butt - Mathematics and Computers in Simulation, 2022 - Elsevier
In this article, a multigrid solver for distributed optimal control problems governed by time-
independent Navier–Stokes equations is presented. A mixed (velocity–pressure) tracking …