Abstract
In this study, we conduct a two-dimensional numerical analysis of radiative heat transfer in a gas-solid two-phase medium using the finite difference time domain (FDTD) method. In gas-solid two-phase medium such as aerosol, which is suspension of fine solid particles or liquid droplets in a gas, radiative heat transfer process is complicated phenomenon because of multiple scattering and absorption of light by aerosol particles. Since the scattering pattern is affected by the wavelength and scatterer size, it needs to consider wavelength-energy distribution of the incident wave. Therefore, we assume solar radiation and analyze the electromagnetic waves with the wavelength range of 0.1-4 μm, of which energy corresponds to 99% of the total solar radiation energy. Because the wavelength range is divided every 0.1 μm, the Maxwell equations for 40 electromagnetic waves are solved simultaneously. The electromagnetic waves emitted to a perfect columnar conductor are calculated and this method is validated by comparing with results calculating a wave with single wavelength.
