期刊文献+

非均质泡沫结构与导热性能的2D模拟 被引量:3

2D Simulation of Structure and Thermal Conductivity of Non-homogeneous Porous Foams
下载PDF
导出
摘要 以石墨泡沫为代表的新型多孔功能材料具有低密度、高孔隙率、高导热性能等优良特性,因而受到广泛关注和研究。多孔材料的有效导热系数与孔隙结构有关,通常用孔隙率作为结构参数,但实际多孔材料的孔隙分布大多是非均匀的、随机的,因此单一的孔隙率不足以描述其孔隙结构。提出一种2D随机结构的多孔泡沫导热模型,根据大样本的有限元法数值模拟结果,指出非均质多孔泡沫的有效导热系数可表示为孔隙率和孔隙均匀度的函数。 As the representative of new functional materials, graphite foam exhibits low density, high porosity, high thermal conductivity and other excellent properties, has been widely concern and study. The effective thermal conductivity of porous materials is relevant to pore structure, which is usually described by porosity. Porous materials are non-homogeneous, the pore distribution is non-uniform and random, so porosity can not express the randomness of the pore structure well. The two-dimension random models are set up, base on the finite element method(FEM) simulation with large sample, it is pointed that the effective thermal conductivity of non-homogeneous porous foam can be expressed as function of porosity and pore uniformity.
出处 《材料导报》 EI CAS CSCD 北大核心 2012年第24期125-128,共4页 Materials Reports
基金 重庆市科技攻关计划资助项目(81826) "211工程"三期建设项目(S-09101) 中央高校基本科研业务费资助项目(CDJXS11140014)
关键词 非均质多孔泡沫 有效导热系数 偏心因子 孔隙均匀度 non-homogeneous porous foam, effective thermal conductivity, eccentric factor, pore uniformity
  • 相关文献

参考文献10

  • 1Kaviany M. Principles of heat transfer in porous media[M].New York:springer-verlag,1995.
  • 2Boomsma K,Poulikakos D. On the effective therma conductivity of a three-dimensionally structured fluid-saturated metal foam[J].International Journal of Heat and Mass Transfer,2001,(04):827.
  • 3Jagjiwanram,Ramvir Singh. Effective thermal conductivity of highly porous two-phase systems[J].Applied Thermal Engineering,2004,(17):2727.
  • 4Ramvir Singh,Kasana H S. Computational aspects of effective thermal conductivity of highly porous metal foams[J].Applied Thermal Engineering,2004,(13):1841.
  • 5Nidia C Gallego,James W Klett. Carbon foams for thermal management[J].Carbon,2003,(07):1461.
  • 6施明恒,虞维平,王补宣.多孔介质传热传质研究的现状和展望[J].东南大学学报(自然科学版),1994,24(S1):1-7. 被引量:28
  • 7李小川,施明恒,张东辉.非均匀多孔介质有效热导率分析[J].工程热物理学报,2006,27(4):644-646. 被引量:11
  • 8Michailidis N,Stergioudi F,Omar H. An image-based reconstruction of the 3D geometry of an Al open-cell foam and FEM modeling of the material response[J].Mechan Mater,2010,(02):142.
  • 9Druma A M,Alam M K,Druma C. Analysis of thermal conduction in carbon foams[J].International Journal of Thermal Sciences,2004,(05):689.
  • 10Klett J,McMillan A D,Gallego N C. The role of structure on the thermal properties of graphitic foam[J].Journal of Materials Science,2004,(11):3659.

二级参考文献3

  • 1帕坦卡.导热与流体流动的数值计算[M].北京:科学出版社,1984..
  • 2Shi Mingheng,Zong Xiangkang.Thermal Conductivity and Aging of Polyurethane Foam.J.Southeast University,1990,6(1):76-84
  • 3张东辉,金峰,施明恒,杨浩.分形多孔介质中的热传导[J].应用科学学报,2003,21(3):253-257. 被引量:13

共引文献36

同被引文献40

引证文献3

二级引证文献2

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部