A 1-D transient mathematical model was studied for a composite system consisting of a substrate (steel) and an intumescent coating exposed to radiati®e heating. By applying a simple heat conduction equation for the first material, a general model proposes the coating consisting of three components, which degrade according to independent finiterate reactions. Mass and heat transfer take place across a ®ariable ®olume medium, including a simplified mechanism for bubble dynamics and material swelling. A parametric analysis clarifies the role of se®eral parameters on the fire retardancy performance of the coating. Good agreement is obtained between predictions and measurements of the substrate temperature profiles.
Mathematical Model for the Nonsteady Decomposition of Intumescent Coatings
Carmen Branca
2001
Abstract
A 1-D transient mathematical model was studied for a composite system consisting of a substrate (steel) and an intumescent coating exposed to radiati®e heating. By applying a simple heat conduction equation for the first material, a general model proposes the coating consisting of three components, which degrade according to independent finiterate reactions. Mass and heat transfer take place across a ®ariable ®olume medium, including a simplified mechanism for bubble dynamics and material swelling. A parametric analysis clarifies the role of se®eral parameters on the fire retardancy performance of the coating. Good agreement is obtained between predictions and measurements of the substrate temperature profiles.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
