Spectral and boundary effects on coupled conduction-radiation heat transfer through semitransparent solids

The coupling of the conduction and radiation modes of heat transfer in a semitransparent solid such as glass is investigated in this study. In particular, the influence of the emission-reflection characteristics of the bounding surfaces, absorption spectrum and spectral absorption coefficient band model on the temperature distribution and heat transfer are examined. Numerical results based on a rigorous formulation of the equation of transfer and energy equation are presented for a large range of optical thickness and conduction-radiation interaction parameter. The error incurred with simplified techniques for predicting the heat transfer is also demonstrated.