Jun Yamada

Radiative heat exchange between a fluidized bed and heated surface

Abstract The radiative heat exchange between a fluidized bed and a heated surface was investigated via an optical experiment employing a He-Ne laser and numerical simulation analysis. A model for predicting the radiative heat transfer is proposed that considers the thermal boundary layer near the heated surface. The numerical results indicate that radiative heat transfer is enhanced when the penetration depth of radiation is greater than the thickness of the thermal boundary layer. This occurs because the radiation is effectively exchanged between the heated surface and low-temperature particles fluidizing outside the thermal boundary layer. These results are in good agreement with radiation heat transfer measurements.

Radiation Transport in Porous or Fibrous Media

This paper dealt with the radiation transport in porous or fibrous media. The first half of this paper shows the fundamentals of radiative transfer in a dispersed medium and a brief review of radiation scattering from a particle, and the second half is our update studies of estimation both of the radiative properties of fibrous media and of the complex refractive index of the material.