Abstract
The effective thermal conductivity with convection and radiation is analyzed by the homogenization method. This method can represent the microstructure in the packed bed precisely. In this study, Effect of parameters such as emissivity of radiation, temperature, contact area and particle size of the packed bed, on the conductivity has been estimated. For example, heat transfer by radiation is not dominant for the material with void less than 1 mm. Effect of contact area and pressure on effective thermal conductivity are negligible for thermal radiation. The homogenization method can become a powerful tool for the estimation of the effective thermal conductivity of the packed bed by considering the microscopic behavior.
