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基于分形理论的石墨泡沫新材料导热系数 被引量:7

Effective Thermal Conductivity of a New Material of Graphite Foam Based on Fractal Theory
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摘要 新型导热材料石墨泡沫具有很好的热物理性质。文中应用分形理论讨论了这种新型多孔材料的分形特性,并在此基础上建立了石墨泡沫材料的导热模型。采用热阻法给出了石墨泡沫材料的等效导热系数的关系式。在空腔边长为200~500μm,对应的体孔隙率为82%~73%条件下,计算了石墨泡沫的体积分形维数和等效导热系数。这种新的研究方法对多孔材料热物性研究有一定指导意义。 The new material of graphite foam is a good thermal-conductivity material. With fractal theory, the fractal character of this novel porous material is discussed. Then a thermal-conductivity model of graphite foam is proposed. The relationship formula of effective thermal conductivity is presented by using thermal resistance method. The volume fractal dimension and effective thermal conductivity of this material are calculated. This new method for calculation is significant for porous material.
出处 《重庆大学学报(自然科学版)》 EI CAS CSCD 北大核心 2004年第9期109-111,共3页 Journal of Chongqing University
基金 重庆市科技攻关项目
关键词 石墨泡沫 导热系数 分形 graphite foam thermal conductivity fractal
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参考文献5

  • 1KLETT JW, BURCHELL TD. High Thermal Conductivity Mesophase Pitch - Derived Carbon Foam[ A ]. The 43rd International SAMPE Symposium[ C]. Anaheim,CA, May31 -June 4, 1998.
  • 2JAMES KLETT, RON OTT, APRIL MCMILLAN. Heat Exchangers for Heavy Vehicles Utilizing High Thermal Conductivity Graphite Foams [ A ]. Sae Technical Paper Series [C]. 2000-01-2207.
  • 3JAMES KLETT, PATRICK LIOYD. Development of High Thermal Conductivity, Low Density Graphite Foam [ EB/OL]. http:∥www. aquafoam. com/papers/pocofoam. pdf.January 2001.
  • 4JAMES KLETT. High Thermal Conductivity Graphite Foams [EB/OL]. http:∥www. ms. omi. gov/resear - chgroups/cmt/foam/foams. btm. July 2002.
  • 5JAMES KLETT. Graphite Foam with High Thermal Conductivity and Diffusivity Conducts Heat in All Directions [ EB/OL]. http:∥www. mrs. org/publications/bulletin. December 2000.

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