Randomized Neural Networks with Petrov–Galerkin Methods for Solving Linear Elasticity and Navier–Stokes Equations

Y Shang, F Wang - Journal of Engineering Mechanics, 2024 - ascelibrary.org
We develop randomized neural networks (RNNs) with Petrov–Galerkin (RNN-PG) methods
to solve linear elasticity and Navier–Stokes equations. RNN-PGs use the Petrov–Galerkin …

Randomized Neural Networks with Petrov-Galerkin Methods for Solving Linear Elasticity Problems

Y Shang, F Wang - arXiv preprint arXiv:2308.03088, 2023 - arxiv.org
We develop the Randomized Neural Networks with Petrov-Galerkin Methods (RNN-PG
methods) to solve linear elasticity problems. RNN-PG methods use Petrov-Galerkin …

A mixed discontinuous Galerkin method with symmetric stress for Brinkman problem based on the velocity–pseudostress formulation

Y Qian, S Wu, F Wang - Computer Methods in Applied Mechanics and …, 2020 - Elsevier
The Brinkman equations can be regarded as a combination of the Stokes and Darcy
equations which model transitions between the fast flow in channels (governed by Stokes …

A discontinuous Galerkin method for the coupled Stokes and Darcy problem

J Wen, J Su, Y He, H Chen - Journal of Scientific Computing, 2020 - Springer
Combining the mixed discontinuous Galerkin method for the Darcy flow and the interior
penalty discontinuous Galerkin methods for the Stokes problem, a locally conservative …

The analogue of grad-div stabilization in DG method for a coupled Stokes and Darcy problem

J Wen, Z Chen, Y He - Computers & Mathematics with Applications, 2023 - Elsevier
Many stable and convergent numerical methods are not pressure robust for an
incompressible flow problem, due to the relaxation of a discrete divergence constraint called …

A mixed discontinuous Galerkin method for the wave equation

L He, F Wang, J Wen - Computers & Mathematics with Applications, 2021 - Elsevier
We study a mixed discontinuous Galerkin (DG) method for solving the second-order wave
equation. The stress variable p and the displacement variable u are discretized by the mixed …

[PDF][PDF] Mixed discontinuous Galerkin method for Quasi-Newtonian Stokes flows

Y Qian, W Yan, F Wang - J. Comput. Math., 2023 - doc.global-sci.org
In this paper, we introduce and analyze an augmented mixed discontinuous Galerkin (MDG)
method for a class of quasi-Newtonian Stokes flows. In the mixed formulation, the unknowns …

Optimal order error estimates of a mixed discontinuous Galerkin method with BDF-2 scheme for transient Darcy flow

S Shah, L He, W Cai, S Khattak - Waves in Random and Complex …, 2023 - Taylor & Francis
In this paper, we study the numerical solution of Darcy flow via a mixed discontinuous
Galerkin method. The two-step Euler backward formula is used for the time variable …

Simplified Weak Galerkin Methods for Linear Elasticity on Nonconvex Domains

C Wang, S Zhang - arXiv preprint arXiv:2411.17879, 2024 - arxiv.org
This paper presents a weak Galerkin (WG) finite element method for linear elasticity on
general polygonal and polyhedral meshes, free from convexity constraints, by leveraging …

A new DG method for a pure--stress formulation of the Brinkman problem with strong symmetry

S Meddahi, R Ruiz-Baier - arXiv preprint arXiv:2204.03445, 2022 - arxiv.org
A strongly symmetric stress approximation is proposed for the Brinkman equations with
mixed boundary conditions. The resulting formulation solves for the Cauchy stress using a …