Results 21 to 30 of about 6,260 (222)
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 +3 more
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Mathematical Modelling and Analysis, 2014 This paper presents a full multigrid (FMG) technique, which combines a multigrid method, an active set algorithm and a nested iteration technique, to solve a linear complementarity problem (LCP) modeling elastic normal contact problems.
Jing Zhao +2 more
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Application of multigrid NLS-4DVar in radar radial velocity data assimilation with WRF-ARW
Atmospheric and Oceanic Science Letters, 2019 The nonlinear least-squares four-dimensional variational assimilation (NLS-4DVar) method introduced here combines the merits of the ensemble Kalman filter and 4DVar assimilation methods.
Lu ZHANG, Xiangjun TIAN, Hongqin ZHANG
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A note on multigrid preconditioning for fractional PDE-constrained optimization problems
Results in Applied Mathematics, 2021 In this note we present a multigrid preconditioning method for solving quadratic optimization problems constrained by a fractional diffusion equation.
Harbir Antil +2 more
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Examples and Counterexamples, 2021 In this work, we consider the design of a geometric multigrid method with multiplicative Schwarz smoothers for the eddy-current problem and the time-harmonic Maxwell equations.
Sebastian Kinnewig +2 more
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Convergence Analysis of Multigrid Solver for Cahn-Hilliard Equation [PDF]
Jisuanji kexue, 2023 The Cahn-Hilliard(CH) equation is a fundamental nonlinear equation in the phase field model and is usually analyzed using numerical methods.Following a numerical discretization,we get a nonlinear equations system.The full approximation scheme(FAS) is an ...
GUO Jing, QI Deyu
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A full multigrid method for semilinear elliptic equation [PDF]
, 2017 summary:A full multigrid finite element method is proposed for semilinear elliptic equations. The main idea is to transform the solution of the semilinear problem into a series of solutions of the corresponding linear boundary value problems on the ...
Xie, Hehu, Xu, Fei
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A numerical solution of parabolic quasi-variational inequality nonlinear using Newton-multigrid method [PDF]
Iranian Journal of Numerical Analysis and OptimizationIn this article, we apply three numerical methods to study the L∞-convergence of the Newton-multigrid method for parabolic quasi-variational inequalities with a nonlinear right-hand side.
M. Bahi, M. Beggas, N. Nesba, A. Imtiaz
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Multigrid accelerated simulations for Twisted Mass fermions
EPJ Web of Conferences, 2018 Simulations at physical quark masses are affected by the critical slowing down of the solvers. Multigrid preconditioning has proved to deal effectively with this problem.
Bacchio Simone +2 more
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Multigrid fourier analysis on semi‐structured anisotropic meshes for vector problems
Mathematical Modelling and Analysis, 2010 An efficient multigrid finite element method for vector problems on triangular anisotropic semi‐structured grids is proposed. This algorithm is based on zebra line‐type smoothers to overcome the difficulties arising when multigrid is applied on stretched
Francisco J. Gaspar +2 more
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