Effects of density distribution of growing frost layer on radiation transfer

✍ Scribed by Atsumasa Yoshida; Takeshi Haida; Eiji Matsumoto; Seiichi Washio

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 147 KB
• Volume: 30
• Category: Article
• ISSN: 1099-2871
• DOI: 10.1002/htj.1030

✦ Synopsis

Abstract

Our main interest concerned the effects of the density distribution on radiation transfer in scattering media. The frost layer in the early growth stage under the control of diffusion was chosen as the media. Numerical analysis of the radiation transfer was carried out by using a modified Monte Carlo method on the basis of geometrical optics. A diffusion‐limited aggregation theory was introduced to simulate the growth of a frost layer with a treelike structure. The relation between the density distribution and the transmittance of the simulated model was made clear by the numerical analysis. On the basis of these results, optical measurements in the visible wavelength region were utilized to evaluate the density distribution in the frost layer, which varied with cooling condition, on the transmittance values. © 2001 Scripta Technica, Heat Trans Asian Res, 30(5): 439–450, 2001