Computational domain lap model for micro-nano scale radiative heat transfer

Abstract

In this work, a new model is built to discuss the lap method in the radiative calculation of micro-nano materials. The model aims to solve larger-scale radiative problems by the electromagnetic method using numerical calculation. The entire two-dimensional calculated areas are successively divided into several sub-areas. The new areas called lap areas are set to consider the near effects between the calculated areas and to obtain the light transport information applied in the next part. The two lap methods have been applied to calculate the semitransparent fibrous materials arranged in different structures, such as medium properties, particle interval, and distribution size of lap areas. Within the selected spectral, the lap areas are shown useful to obtain the more accurate final results except for certain special wavelengths such as 2 μm, which are related to the energy distribution of the light on the source interfaces. The final result of the lap method exhibited a deviation of approximately 2% in 4 μm, but poor results in shorter wavelengths. The paper shows the results of the lap method and analyzes the errors with the exact value. It is found that the lap method can consider two adjacent particles’ effects in most wavelength.