Error estimates in weak Galerkin finite element methods for parabolic equations under low regularity assumptions

B Deka, N Kumar - Applied Numerical Mathematics, 2021 - Elsevier
In this paper, we consider the weak Galerkin finite element approximations of second order
linear parabolic problems in two dimensional convex polygonal domains under the low …

A stabilizer free weak Galerkin finite element method with supercloseness of order two

A Al‐Taweel, X Wang, X Ye… - Numerical Methods for …, 2021 - Wiley Online Library
The weak Galerkin (WG) finite element method is an effective and flexible general numerical
technique for solving partial differential equations. A simple WG finite element method is …

A systematic study on weak Galerkin finite element method for second‐order parabolic problems

B Deka, N Kumar - Numerical Methods for Partial Differential …, 2023 - Wiley Online Library
In the present work, we have described a systematic numerical study on weak Galerkin (WG)
finite element method for second‐order linear parabolic problems by allowing polynomial …

Order two superconvergence of the CDG finite elements on triangular and tetrahedral meshes

X Ye, S Zhang - 2023 - udspace.udel.edu
It is known that discontinuous finite element methods use more unknown variables but have
the same convergence rate comparing to their continuous counterpart. In this paper, a novel …

On the superconvergence of a WG method for the elliptic problem with variable coefficients

J Wang, X Wang, X Ye, S Zhang, P Zhu - Science China Mathematics, 2024 - Springer
This article extends a recently developed superconvergence result for weak Galerkin (WG)
approximations for modeling partial differential equations from constant coefficients to …

[HTML][HTML] Locally structure-preserving div-curl operators for high order discontinuous Galerkin schemes

W Boscheri, G Dimarco, L Pareschi - Journal of Computational Physics, 2023 - Elsevier
We propose a novel Structure-Preserving Discontinuous Galerkin (SPDG) operator that
recovers at the discrete level the algebraic property related to the divergence of the curl of a …

A new numerical method for div-curl systems with low regularity assumptions

S Cao, C Wang, J Wang - Computers & Mathematics with Applications, 2022 - Elsevier
This paper presents a new numerical method for div-curl systems with the normal boundary
condition by using a finite element technique known as primal-dual weak Galerkin (PDWG) …

A weak Galerkin least-squares finite element method for div–curl systems

J Li, X Ye, S Zhang - Journal of Computational Physics, 2018 - Elsevier
In this paper, we introduce a weak Galerkin least-squares method for solving div–curl
problem. This finite element method leads to a symmetric positive definite system and has …

New primal-dual weak Galerkin finite element methods for convection-diffusion problems

W Cao, C Wang - Applied numerical mathematics, 2021 - Elsevier
This article devises a new primal-dual weak Galerkin finite element method for the
convection-diffusion equation. Optimal order error estimates are established for the primal …

An Lp-primal–dual weak Galerkin method for convection–diffusion equations

W Cao, C Wang, J Wang - Journal of Computational and Applied …, 2023 - Elsevier
In this article, the authors present a new L p-primal–dual weak Galerkin method (L p-PDWG)
for convection–diffusion equations. Comparing with the standard L 2-PDWG method, the …