点击次数：

论文类型：期刊论文

发表时间：2011-08-01

发表刊物：COMPUTATIONAL MATERIALS SCIENCE

收录刊物：SCIE、EI

卷号：50

期号：10

页面范围：2750-2758

ISSN号：0927-0256

关键字：Granular materials; Thermal conduction; Multi-scale method; Base function

摘要：A multi-scale method is developed to simulate the transient thermal conduction within granular materials consisting of a large number of particles in vacuum. The basic idea of this method is to construct the numerical base functions considering both the topology and the material properties of the particles within the granular system. Dividing the whole domain into a number of coarse elements, the base functions can be accounted from solving the boundary value problem on each element. The thermal conduction and the heat capacity matrices can then be obtained from the contributions of all the contact pairs corresponding to each coarse element. With the global thermal property matrices assembled, the transient thermal conduction problem can be solved using the same technique as the finite element method. Moreover, the temperature of every particle can be simultaneously obtained from the downscaling computation during the computation procedure. The numerical tests indicate that the developed method can be successfully used for solving the transient thermal conduction problem within the granular materials, which can reduce the computational efforts greatly. (C) 2011 Elsevier B.V. All rights reserved.