Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8901979 | Journal of Computational and Applied Mathematics | 2018 | 26 Pages |
Abstract
This article studies a residual-based a posteriori error analysis for the Crank-Nicolson time-stepping finite element method for a linear parabolic interface problem in a bounded convex polygonal domain in R2. A piecewise linear finite element space is used in space that is allowed to change in time and a modified Crank-Nicolson approximation is applied for the time discretizations. We employ a space-time reconstruction that is piecewise quadratic in time and the Clément-type interpolation estimates to derive optimal order in time and an almost optimal order in space a posteriori error bound in the Lâ(L2)-norm. The interface is assumed to be of arbitrary shape but is of class C2 for our purpose. Numerical results are presented to validate the derived estimators.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Applied Mathematics
Authors
Jhuma Sen Gupta, Rajen Kumar Sinha, Gujji Murali Mohan Reddy, Jinank Jain,