Study on Overlapping Model for Computational Thermal Radiative Transfer of Non-Absorbing Particle With Coherent Scattering

Aiming at the spectral radiation transmission in non-absorbing optical thick fiber materials, considering the influence of interparticle mutual interference in high-density particles on the overlapping process of spectral radiation transmission, an overlapping model of total transmission calculation of spectral radiation was established. The radiation properties of a single non-absorbent fiber were calculated by finite difference time domain (FDTD). Based on numerical simulation, the effects of material thickness, fiber spacing and arrangement on the macroscopic transmittance of the material at 2-5μm wavelength are analyzed. By comparing the differences between calculated results and the real values of different overlapping domains, it is found that the reflection of spectral radiation by non-absorbed fibers is concentrated in the vicinity of the incident surface of the material, and the overlapping model is more suitable for the cross fiber materials.