Results 11 to 20 of about 9,300 (265)

A Posteriori Error Estimates for Darcy–Forchheimer’s Problem

open access: yesComputational Methods in Applied Mathematics, 2022
Abstract This work deals with the a posteriori error estimates for the Darcy–Forchheimer problem. We first introduce the corresponding variational formulation for the nonlinear problem and discretize it by using the finite-element method.
Toni Sayah, Georges Semaan, Faouzi Triki
openaire   +6 more sources

A posteriori error estimates of characteristic mixed finite elements for convection-diffusion control problems

open access: yesOpen Mathematics, 2022
In this article, we consider fully discrete characteristic mixed finite elements for convection-diffusion optimal control problems. We use the characteristic line method to treat the hyperbolic part of the state equation as a directional derivative.
Tang Yuelong, Hua Yuchun
doaj   +1 more source

Local Projection-Based Stabilized Mixed Finite Element Methods for Kirchhoff Plate Bending Problems

open access: yesAbstract and Applied Analysis, 2013
Based on stress-deflection variational formulation, we propose a family of local projection-based stabilized mixed finite element methods for Kirchhoff plate bending problems.
Xuehai Huang
doaj   +1 more source

A priori and a posteriori estimates of the stabilized finite element methods for the incompressible flow with slip boundary conditions arising in arteriosclerosis

open access: yesAdvances in Difference Equations, 2019
In this paper, we develop the lower order stabilized finite element methods for the incompressible flow with the slip boundary conditions of friction type whose weak solution satisfies a variational inequality.
Jian Li, Haibiao Zheng, Qingsong Zou
doaj   +1 more source

L2-Norm Based a Posteriori Error Estimates of Compressible and Nearly-Incompressible Elastic Finite Element Solutions

open access: yesApplied Sciences, 2022
The displacement and stress-based error estimates in a posteriori error recovery of compressible and nearly-incompressible elastic finite element solutions is investigated in the present study.
Mohd. Ahmed   +3 more
doaj   +1 more source

Residual-based a posteriori error estimates for the hp version of the finite element discretization of the elliptic Robin boundary control problem

open access: yesResults in Applied Mathematics, 2022
Optimal control problems governed by partial differential equations have become a very active and successful research area. So, in this paper, we analyzed a priori and a posteriori error estimates for the hpfinite element discretization of elliptic Robin
Samuel Gbéya   +3 more
doaj   +1 more source

A Type of Multigrid Method Based on the Fixed-Shift Inverse Iteration for the Steklov Eigenvalue Problem

open access: yesAdvances in Mathematical Physics, 2016
For the Steklov eigenvalue problem, we establish a type of multigrid discretizations based on the fixed-shift inverse iteration and study in depth its a priori/a posteriori error estimates.
Feiyan Li, Hai Bi
doaj   +1 more source

Adaptive Refinement in Advection–Diffusion Problems by Anomaly Detection: A Numerical Study

open access: yesAlgorithms, 2021
We consider advection–diffusion–reaction problems, where the advective or the reactive term is dominating with respect to the diffusive term. The solutions of these problems are characterized by the so-called layers, which represent localized regions ...
Antonella Falini, Maria Lucia Sampoli
doaj   +1 more source

A Posteriori Error Estimates for the Generalized Overlapping Domain Decomposition Methods

open access: yesJournal of Applied Mathematics, 2012
A posteriori error estimates for the generalized overlapping domain decomposition method (GODDM) (i.e., with Robin boundary conditions on the interfaces), for second order boundary value problems, are derived.
Hakima Benlarbi, Ahmed-Salah Chibi
doaj   +1 more source

Shifted Sobol points and multigrid Monte Carlo simulation

open access: yesDiscrete and Continuous Models and Applied Computational Science, 2021
Multidimensional integrals arise in many problems of physics. For example, moments of the distribution function in the problems of transport of various particles (photons, neutrons, etc.) are 6-dimensional integrals.
Aleksandr A. Belov, Maxim A. Tintul
doaj   +1 more source

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