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On the thermal conductivity of sintered metallic fibre structures

机译:烧结金属纤维结构的导热系数

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摘要

The present paper investigates the anisotropic thermal conductivity of a novel sintered metallic fibre structure with different porosities (i.e. 51.9%, 74.9%, 81.4%). Different methodologies are applied: numerical calculations (i.e. Finite Element and Lattice Monte Carlo methods) based on micro-computed tomography images, experimental tests (i.e. steady-state plate method) and analytical modelling. Good agreement between the numerical methods and experimental measurements is obtained for high porosity models (i.e. porosity > 72.5%). Furthermore, the thermal conductivity decreases with increasing porosity. A distinct thermal anisotropy is found where maximum values are in the parallel direction and minimum values in the transverse direction to the fibres.
机译:本文研究了一种具有不同孔隙率(即51.9%,74.9%,81.4%)的新型烧结金属纤维结构的各向异性导热系数。应用了不同的方法:基于微计算机断层扫描图像的数值计算(即有限元和Lattice Monte Carlo方法),实验测试(即稳态平板法)和分析建模。对于高孔隙率模型(即孔隙度> 72.5%),数值方法与实验测量值之间具有良好的一致性。此外,导热率随着孔隙率的增加而降低。发现了明显的热各向异性,其中最大值在平行于纤维的方向上,最小值在与纤维横向的方向上。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第10期|p.2440-2448|共9页
  • 作者单位

    The University of Newcastle, School of Engineering, Centre for Mass and Thermal Transport in Engineering Materials, Callaghan, NSW 2308, Australia;

    The University of Newcastle, School of Engineering, Centre for Mass and Thermal Transport in Engineering Materials, Callaghan, NSW 2308, Australia;

    Fraunhofer Institute for Manufacturing Technology and Advanced Materials, Branch Lab Dresden, Winterbergstr. 28, 01277 Dresden, Germany;

    Fraunhofer Institute for Manufacturing Technology and Advanced Materials, Branch Lab Dresden, Winterbergstr. 28, 01277 Dresden, Germany;

    University of Applied Sciences Aalen, Department of Surface Engineering and Material Science, Faculty of Mechanical and Material Engineering, Beethovenstr. 1,73430 Aalen, Germany;

    The University of Newcastle, School of Engineering, Centre for Mass and Thermal Transport in Engineering Materials, Callaghan, NSW 2308, Australia;

    The University of Newcastle, School of Engineering, Centre for Mass and Thermal Transport in Engineering Materials, Callaghan, NSW 2308, Australia;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    sintered metallic fibre structures; thermal conductivity; micro-computed tomography; finite element analysis; lattice monte carlo method; experimental test;

    机译:烧结金属纤维结构;导热率;微计算机断层扫描;有限元分析;晶格蒙特卡洛法;实验测试;

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