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A Study of Hybrid Airfoil Design Method Read chapter Read first chapter

2019 | OriginalPaper | Chapter

An Improved Tri-linear Interpolation Method for Hybrid Overset Grids and Its Application

Authors : Pengcheng Cui, Bin Li, Jing Tang, Xiaoquan Gong, Mingsheng Ma

Published in: The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018)

Publisher: Springer Singapore

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Abstract

Tri-linear interpolation method is the most popular approach in data transferring between overset grids due to its briefness and robustness, however it is not sufficient to guarantee the conservation of flow variable. An improved tri-linear interpolation method for overset mesh is presented. A cell-cut algorithm is applied to construct a local supermesh in the overlapping grid area, which could be used to improve the conservation of flow variable. The number of donor cells is expanded reasonably to improve the accuracy of interpolation, and a volume weighted method is applied to eliminate interpolation error coming from the grids mismatch in the overlapping grid areas. Numerical results show that compared with original tri-linear interpolation method, the improved method could reduce the numerical errors, interpolate the flow variables more accurately. For linearly and non-linearly distributed flow variables, the improved tri-linear method is more conservative because it has inherited the conservation of supermesh, and it is robust and engineering-practical for complex engineering applications.

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Metadata
Title
An Improved Tri-linear Interpolation Method for Hybrid Overset Grids and Its Application
Authors
Pengcheng Cui
Bin Li
Jing Tang
Xiaoquan Gong
Mingsheng Ma
Copyright Year
2019
Publisher
Springer Singapore
Book
The Proceedings of the 2018 Asia-Pacific International Symposium on Aerospace Technology (APISAT 2018)

Print ISBN: 978-981-13-3304-0

Electronic ISBN: 978-981-13-3305-7

Copyright Year: 2019

DOI
https://doi.org/10.1007/978-981-13-3305-7_49

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