Effective Thermal Conductivity of Packed Beds

Abstract

Numerical solutions were obtained by the relaxation method to the combined conduction and radiation heat transfer equation in the cubic (ε=O.476) and orthorhombic (ε=C395) lattice models of spheres, respectively. The calculated results are shown in chart as ke/kf vs. ks/kf { = Io-3~ lO4) with parameter of hγ Dp/ks (= 0~l). Effective thermal conductivities were experimentally determined and found in good agreement with the theory. The formula for radiation heat transfer coefficient hγ is also presented. © 1969, The Society of Chemical Engineers, Japan. All rights reserved.