多孔質材料の有効熱伝導度に対する一考察 [in Japanese] Characteristic of Effective Thermal Conductivity in Porous Materials [in Japanese]
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The effective thermal conductivities of porous materials are calculated with a finite element method by the fundamental equation of heat conduction in porous materials in the case of void fraction, pore shapes and thermal conductivity ratio of two phases.<BR>Effective thermal conductivities in the porous materials with spherical pores are larger than those with cylindrical and parallelepipedic pores, and agree closely with the Maxwell-Eucken equation. Since effective thermal conductivities in the case of cylindrical and parallelepipedic pores are almost the same, a correlative equation is obtained by using the numerical results for these pore shapes.<BR>To check these calculated results, the temperature distributions and effective thermal conductivities were measured experimentally under the same operating conditions as those of the theoretical analysis.
- Chemical engineering
Chemical engineering 23(4), 583-586, 1997-07-10
The Society of Chemical Engineers, Japan