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An improved local remeshing algorithm for moving boundary problems

Zheng, Jianjing; Chen, Jianjun; Zheng, Yao; Yao, Yufeng; Li, Shaolei; Xiao, Zhoufang

An improved local remeshing algorithm for moving boundary problems Thumbnail


Authors

Jianjing Zheng

Jianjun Chen

Yao Zheng

Yufeng Yao Yufeng.Yao@uwe.ac.uk
Professor in Aerospace Engineering

Shaolei Li

Zhoufang Xiao



Abstract

© 2016 The Author(s). Three issues are tackled in this study to improve the robustness of local remeshing techniques. Firstly, the local remeshing region (hereafter referred to as ‘hole’) is initialized by removing low-quality elements and then continuously expanded until a certain element quality is reached after remeshing. The effect of the number of the expansion cycle on the hole size and element quality after remeshing is experimentally analyzed. Secondly, the grid sources for element size control are attached to moving bodies and will move along with their host bodies to ensure reasonable grid resolution inside the hole. Thirdly, the boundary recovery procedure of a Delaunay grid generation approach is enhanced by a new grid topology transformation technique (namely shell transformation) so that the new grid created inside the hole is therefore free of elements of extremely deformed/skewed shape, whilst also respecting the hole boundary. The proposed local remeshing algorithm has been integrated with an in-house unstructured grid-based simulation system for solving moving boundary problems. The robustness and accuracy of the developed local remeshing technique are successfully demonstrated via industry-scale applications for complex flow simulations.

Citation

Zheng, J., Chen, J., Zheng, Y., Yao, Y., Li, S., & Xiao, Z. (2016). An improved local remeshing algorithm for moving boundary problems. Engineering Applications of Computational Fluid Mechanics, 10(1), 403-426. https://doi.org/10.1080/19942060.2016.1174888

Journal Article Type Article
Acceptance Date Apr 2, 2016
Online Publication Date May 31, 2016
Publication Date Jan 1, 2016
Deposit Date Jun 1, 2016
Publicly Available Date Mar 29, 2024
Journal Engineering Applications of Computational Fluid Mechanics
Print ISSN 1994-2060
Electronic ISSN 1997-003X
Peer Reviewed Peer Reviewed
Volume 10
Issue 1
Pages 403-426
DOI https://doi.org/10.1080/19942060.2016.1174888
Keywords unstructured grid generation, local remeshing technique, boundary recovery, unsteady flow simulation, moving boundary problems
Public URL https://uwe-repository.worktribe.com/output/907749
Publisher URL http://dx.doi.org/10.1080/19942060.2016.1174888

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