Boundary element analysis of heat conduction problems in anisotropic media with variable coefficients

GAO Xiaowei; ZHAO Jinjun; LIU Jian; HU Jinxiu

doi:10.3969/j.issn.0438-1157.2014.z1.009

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Boundary element analysis of heat conduction problems in anisotropic media with variable coefficients

更新时间：2025-12-10

- Boundary element analysis of heat conduction problems in anisotropic media with variable coefficients
- CIESC Journal Issue S1, Pages: 51-60(2014)
- 作者机构：
  
  1. 大连理工大学航空航天学院, 工业装备结构分析国家重点实验室,辽宁,大连,116024
  2. 中国航天科工集团冲压发动机技术重点实验室,北京,100074
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.z1.009
  CLC： K124
- Online First：30 May 2014，
  
  Published：30 May 2014
- 稿件说明：
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GAO Xiaowei, ZHAO Jinjun, LIU Jian, et al. Boundary element analysis of heat conduction problems in anisotropic media with variable coefficients[J]. CIESC Journal, 2014, (S1): 51-60.
DOI：

GAO Xiaowei, ZHAO Jinjun, LIU Jian, et al. Boundary element analysis of heat conduction problems in anisotropic media with variable coefficients[J]. CIESC Journal, 2014, (S1): 51-60. DOI： 10.3969/j.issn.0438-1157.2014.z1.009.

摘要

提出了一种用边界元法求解一般变系数各向异性热传导问题时建立基本解的方法，并导出了求解一般二维和三维各向异性稳态热传导问题的纯边界积分方程。所建立的基本解考虑了热导率是空间坐标的函数，因此所导出的积分方程可用于求解非均质材料传热问题。由热源项引起的域积分，运用径向积分法将其转换成边界积分，形成不需要内部点的纯边界元算法。给出了二维和三维问题3个分析算例，并通过将边界元法结果与有限元法结果进行对比，证明了方法的正确性和有效性。

Abstract

A method for establishing fundamental solutions of general variable coefficient heat conduction problems in anisotropic media using the boundary element method was presented. The pure boundary integral equation is derived for solving general two- and three- dimensional steady heat conduction problems in anisotropic media. The established fundamental solutions are suitable for the situation that the thermal conductivity is a function of spatial coordinates

and therefore the developed integral equation can be used to solve the heterogeneous material heat transfer problems. The domain integrals induced by heat sources can be transformed into a boundary integral using the radial integral method

so a pure boundary element method which does not need any interior points is formed. Three examples for two- and three- dimensional problems are provided and the correctness and effectiveness of the proposed method is validated by comparing the results using the current method with that of using finite element method.

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