Accession Number : ADA116610

Title :   The Finite Element Method for Parabolic Equations. I. A Posteriori Error Estimation.

Descriptive Note : Final rept.,

Corporate Author : MARYLAND UNIV COLLEGE PARK INST FOR PHYSICAL SCIENCE AND TECHNOLOGY

Personal Author(s) : Bieterman,M ; Babuska,Ivo

PDF Url : ADA116610

Report Date : Apr 1982

Pagination or Media Count : 74

Abstract : In this first of two papers, computable a posteriori estimates of the space discretization error in the finite element method of lines solution of parabolic equations are analyzed for time-independent space meshes. The effectivity of the error estimator is related to conditions on the solution regularity, mesh family type, and asymptotic range for the mesh size. For clarity the results are limited to a model problem in which piecewise linear elements in one space dimension are used. The results extend straightforwardly to systems of equations and higher order elements in one space dimension, while the higher dimensional case requires additional considerations. The theory presented here provides the basis for the analysis and adaptive construction of time-dependent space meshes, which is the subject of the second paper. Computational results show that the approach is practically very effective and suggest that it can be used for solving more general problems. (Author)

Descriptors :   *Finite element analysis, Error analysis, Parabolas, Numerical analysis, Theorems, Estimates

Subject Categories : Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE