A-posteriori error estimates for the finite element method. Technical report TR-581
Computable a posteriori error estimates for finite-element solutions are derived in an asymptotic form for h ..-->.. 0 where h measures the size of the elements. The approach has similarity to the residual method, but differs from it in the use of norms of negative Sobolev spaces corresponding to the given bilinear (energy) form. For clarity the presentation is restricted to one-dimensional model problems. More specifically, the source, eigenvalue, and parabolic problems are considered involving a linear, self-adjoint operator of the second order. Generalizations to more general one-dimensional problems are straightforward, and the results also extend to higher space dimensions; but these invlove some additional considerations. The estimates can be used for a practical a posteriori assessment of the accuracy of a computed finite-element solution, and they provide a basis for the design of adaptive finite-element solvers.
- Research Organization:
- Maryland Univ., College Park (USA). Computer Science Center
- OSTI ID:
- 5448398
- Report Number(s):
- ORO-3443-68
- Country of Publication:
- United States
- Language:
- English
Similar Records
A Posteriori Error Analysis of a Cell-centered Finite Volume Method for Semilinear Elliptic Problems
Robust a posteriori error estimation for finite element approximation to H(curl) problem