Abstract
This paper deals with heat transfer inside cellular solids (foamed glass insulation) under thermal shock and the impact of transient temperature fields on the local integrity (strength) of the structure. The Finite Element model of a three-dimensional regular, periodic structure of the foamed glass for thermal and structural analyses was built. Simulations of transient heat transfer and its effect on the stress distribution were carried out. This paper describes the main heat transfer mechanisms through the foamed glass structure. Essential factors which impact stress distribution within the structure have been identified: rapid thermal expansion effects within thermal shock, the gas pressure inside the structure of foamed glass and its change in transient heat transfer conditions. The residual gas pressure in foam glass was measured experimentally. The impact of this gas on heat transfer was evaluated. The conducted research allows for a better understanding of the behavior of closed-cell solid structures working in elevated temperatures, which allows for the design of more efficient and reliable thermal insulation systems using recycled materials for industrial applications.