Star-based a Posteriori Error Estimator for Convection Diffusion Problems

摘要

In this paper, we derive an a posteriori error estimator, for nonconform- ing _nite element approximation of convection-diffusion equation. The a posteriori error estimator is based on the local problems on stars. Finally, we prove the reliability and the efficiency of the estimator without saturation assumption nor comparison with residual estimator.