Monte Carlo simulation of far infrared radiation heat transfer: theoretical approach.

摘要

Radiation heat transfer models with the combination of the Monte Carlo (MC) method and computational fluid dynamic approach and two-dimensional heat transfer models based on the fundamental quantum physics of radiation and fluid dynamics were developed. The far infrared radiation (FIR) heating in laminar and buoyancy airflow was investigated, and a simple prediction model in laminar airflow was tested with an analytical solution and a commercial software (CFX 4). The adequate number of photon tracks for MC simulation was established. As for the complex design model, the predicted results agreed well with the experimental data with root mean square error of 3.8 K. Because public concerns on food safety are increasing, this model was applied to the prediction of the level of thermal inactivation of microorganisms (Botrytis cinerea and Monilinia fructigena) by coupling with the microbial kinetics model. Under buoyancy airflow condition, the uniformity of the FIR heating was improved by selecting adequate wall temperature and emissivity..