TY - JOUR
T1 - Convergence of a Mixed Finite Element for the Stokes Problem on Anisotropic Meshes
AU - Qingshan Li, Huixia Sun & Shaochun Chen
JO - Journal of Computational Mathematics
VL - 5
SP - 740
EP - 755
PY - 2008
DA - 2008/10
SN - 26
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/jcm/8656.html
KW - Mixed finite element, Stokes problem, Anisotropic meshes, Superconvergence, Shape regularity assumption and inverse assumption.
AB - <p style="text-align: justify;">The main aim of this paper is to study the convergence properties of a low order mixed finite element for the Stokes problem under anisotropic meshes. We discuss the anisotropic convergence and superconvergence independent of the aspect ratio. Without the shape regularity assumption and inverse assumption on the meshes, the optimal error estimates and natural superconvergence at central points are obtained. The global superconvergence for the gradient of the velocity and the pressure is derived with the aid of a suitable postprocessing method. Furthermore, we develop a simple method to obtain the superclose properties which improves the results of the previous works.</p>