Accuracy Enhancing Interface Treatment Algorithm: the Back and Forth Error Compensation and Correction method
Abstract
The accuracy of information transmission while solving domain decomposed problems is crucial to smooth transition of a solution around the interface/overlapping region. This paper describes a systematical study on an accuracy enhancing interface treatment algorithm based on the back and forth error compensation and correction method (BFECC). By repetitively employing a low order interpolation technique (normally local 2\ts{nd} order) 3 times, this algorithm achieves local 3\ts{rd} order accuracy. Analytical derivations for 1D \& 2D cases are made, and the "super convergence" phenomenon (4\ts{th} order accuracy) is found for specific positioning of the donor and target grids. A set of numerical experiments based on various relative displacements, relative rotations, mesh ratios, and meshes with perturbation have been tested, and the results match the derivations. Different interface treatments are compared with 3D examples: corner flow and cavity flow. The component convergence rate analysis shows that the BFECC method positively affects the accuracy of solutions.
Cite
@article{arxiv.2112.08595,
title = {Accuracy Enhancing Interface Treatment Algorithm: the Back and Forth Error Compensation and Correction method},
author = {Wenbin Dong and Yingjie Liu and Hansong Tang},
journal= {arXiv preprint arXiv:2112.08595},
year = {2021}
}
Comments
27 pages, 16 figures