Applied Mathematics and Mechanics (English Edition) ›› 2024, Vol. 45 ›› Issue (1): 137-154.doi: https://doi.org/10.1007/s10483-024-3072-8

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Galerkin-based quasi-smooth manifold element (QSME) method for anisotropic heat conduction problems in composites with complex geometry

Pan WANG1, Xiangcheng HAN1,2, Weibin WEN1,*(), Baolin WANG3, Jun LIANG1,2,*()   

  1. 1 School of Civil Engineering, Central South University, Changsha 410083, China
    2 Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China
    3 School of Science, Harbin Institute of Technology, Shenzhen 518055, Guangdong Province, China
  • Received:2023-08-27 Online:2024-01-01 Published:2023-12-26
  • Contact: Weibin WEN, Jun LIANG E-mail:wenwbin@126.com;liangjun@bit.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(12102043);the National Natural Science Foundation of China(12072375);the National Natural Science Foundation of China(U2241240);the Natural Science Foundation of Hunan Province of China(2023JJ40698);the Natural Science Foundation of Hunan Province of China(2021JJ40710);Project supported by the National Natural Science Foundation of China (Nos. 12102043, 12072375, and U2241240) and the Natural Science Foundation of Hunan Province of China (Nos. 2023JJ40698 and 2021JJ40710)

Abstract:

The accurate and efficient analysis of anisotropic heat conduction problems in complex composites is crucial for structural design and performance evaluation. Traditional numerical methods, such as the finite element method (FEM), often face a trade-off between calculation accuracy and efficiency. In this paper, we propose a quasi-smooth manifold element (QSME) method to address this challenge, and provide the accurate and efficient analysis of two-dimensional (2D) anisotropic heat conduction problems in composites with complex geometry. The QSME approach achieves high calculation precision by a high-order local approximation that ensures the first-order derivative continuity. The results demonstrate that the QSME method is robust and stable, offering both high accuracy and efficiency in the heat conduction analysis. With the same degrees of freedom (DOFs), the QSME method can achieve at least an order of magnitude higher calculation accuracy than the traditional FEM. Additionally, under the same level of calculation error, the QSME method requires 10 times fewer DOFs than the traditional FEM. The versatility of the proposed QSME method extends beyond anisotropic heat conduction problems in complex composites. The proposed QSME method can also be applied to other problems, including fluid flows, mechanical analyses, and other multi-field coupled problems, providing accurate and efficient numerical simulations.

Key words: anisotropic heat conduction, quasi-smooth manifold element (QSME), composite with complex geometry, numerical simulation, finite element method (FEM)

2010 MSC Number: 

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