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Leng, Y., Tian, X., Demkowicz, L., Gomez, H. and Foster, J.T. (2022) A Petrov-Galerkin Method for Nonlocal Convection-Dominated Diffusion Problems. Journal of Computational Physics, 452, Article ID: 110919.
https://doi.org/10.1016/j.jcp.2021.110919

has been cited by the following article:

• TITLE: Spectral-Petrov-Galerkin Method for Parabolic Problems Based on Darcy’s Law-Preserving

  AUTHORS: Shuyun Yang, Yaxing Xiao, Yifan Cao, Yonghui Qin

  KEYWORDS: Parabolic Problem, Legendre-Petrov-Galerkin, Crank-Nicolson, Darcy’s Law, Legendre/Chebyshev Gauss-Lobatto Points

  JOURNAL NAME: Journal of Applied Mathematics and Physics, Vol.14 No.2, February 10, 2026

  ABSTRACT: Darcy’s law is the fundamental equation describing the flow of a fluid through a porous medium. Combined with the principle of mass conservation, it leads to the diffusion Equation (e.g., the groundwater flow equation). In this paper, the Legendre-Petrov-Galerkin method is developed for solving the parabolic problem with Dirichlet boundary conditions based on Darcy’s law-preserving. This problem is transformed into an equivalent first-order system by introducing a flux based on Darcy’s law. Our scheme is based on the Legendre Galerkin method, and the right hand side term is processed using the Legendre/Chebyshev-Gauss-Lobatto points. The time direction is approximated by the Crank-Nicolson method. The algebraic system with a sparse coefficient matrix is obtained by selecting the appropriate basis function. Error estimate of the semi-discrete scheme is given by using Gronwall’s inequality (integral form) and Darcy’s law. Numerical examples show that our scheme has the high-order spectral accuracy and it preserves Darcy’s law.