η%-Superconvergence of finite element approximations in the interior of general meshes of triangles Academic Article uri icon

abstract

  • In this paper we introduce a new definition of superconvergence - tne η%-superconvergence, which generalizes the classical idea of superconvergence to general meshes. We show that this new definition can be employed to determine the regions of least-error in any element in the interior of any grid by using a computer-based approach. We present numerical results for the standard displacement finite element method for the scalar equation of orthotropic heat-conduction, for meshes of conforming triangles of degree p, 1 ≤ p ≤ 5, and elements in the interior of the mesh. The results demonstrate that, unlike classical superconvergence, η%-superconvergence is applicable to the complex grids which are employed in practical engineering computations. © 1995.

published proceedings

  • Computer Methods in Applied Mechanics and Engineering

author list (cited authors)

  • Babuška, I., Strouboulis, T., & Upadhyay, C. S.

citation count

  • 10

complete list of authors

  • Babuška, I||Strouboulis, T||Upadhyay, CS

publication date

  • May 1995