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论文类型：期刊论文

发表时间：2013-11-01

发表刊物：ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS

收录刊物：SCIE、EI、Scopus

卷号：37

期号：11

页面范围：1545-1555

ISSN号：0955-7997

关键字：Transient heat conduction; Multi-domain BEM; Three-step variable condensation technique; Non-homogeneous

摘要：In this paper, a three-step BEM analysis technique is proposed for solving 2D and 3D transient heat conduction problems consisting of multiple non-homogeneous media. The discretized boundary element formulation is written for each medium. The first step is to eliminate internal variables at the individual medium level; the second step is to eliminate boundary unknowns defined over nodes used only by the medium itself; and the third step is to establish the system of equations according to the continuity conditions of the temperature and heat flux at common interface nodes. Based on the central finite difference technique, an implicit time marching solution scheme is developed for solving the time-dependent system of equations. Three numerical examples are given to demonstrate the accuracy and effectiveness of the presented method. (C) 2013 Elsevier Ltd. All rights reserved.