Numerical Modeling of Combined Transient Radiation and Conduction Heat Transfer in Mineral Wool Insulations

This article deals with numerical modeling of coupled heat conduction and radiation in glass wool and rock wool insulations in transient condition using semi-empirical parameters obtained from experimental results. In this research needed thermophysical and physical parameters for numerical model, such as: heat capacity, effective thermal conductivity, fiber’s diameter, and apparent and solid density of these mineral wools are determined by experiments. Radiation heat transfer is modeled by direct simulation and applying Monte Carlo ray trace method; and the thermal conductivity due to air/solid conduction is determined by semi-empirical relation obtained by inverse parameter estimation method as well as experimental results. Radiation is coupled with conduction via heat source term in heat conduction equation. Code results are in a good agreement with experimental results.