Mechanism of Heat Transfer through Porous Media of Inorganic Intumescent Coating in Cone Calorimeter Testing

Sungwook Kang, J.Yoon Choi, S Choi

Research output: Contribution to journalArticle

6 Citations (Scopus)
6 Downloads (Pure)

Abstract

This work discusses the heat transfer process through a particular form of porous media: an inorganic-based intumescent coating in full-expansion state. Although the thermal mechanism in porous media has been vigorously studied for polymeric/ceramic/metallic foams, less information is available on its application with intumescent-type polymers. This examination demonstrates the procedure of (1) the optimisation of the coating’s internal multicellular structure for numerical modelling, based on topological analyses; (2) the finite element simulation for the coating-sample tested with cone calorimetry; and (3) the quantitative evaluation of the thermal insulation performance of its porous structure by adopting effective thermal conductivity. The modelling technique was verified using measurable data from the cone calorimeter tests. Consistent agreement between the numerical predictions and experimental measurements was achieved over the whole steel-substrate temperature history, based on the clarified thermal boundaries of the specimen and modelling of the combined conduction-radiation transfer. This numerical approach exhibits the impacts of porosity, pore-size, and external thermal load on the medium’s performance, as well as the individual contributions of the component heat transfer modes to the overall process. The full understanding of this thermal mechanism can contribute to the enhancement and optimisation of the thermal insulation performance of a porous-type refractory polymer.
Original languageEnglish
Article number221
Pages (from-to)1-26
Number of pages26
JournalPolymers
Volume11
Issue number2
Early online date29 Jan 2019
DOIs
Publication statusPublished - 29 Jan 2019

Keywords

  • intumescent coating;
  • cone calorimeter;
  • heat transfer;
  • porous media;
  • effective thermal
  • Porous media
  • Effective thermal conductivity
  • Intumescent coating
  • Cone calorimeter
  • Finite element analysis
  • Heat transfer
  • intumescent coating
  • finite element analysis
  • cone calorimeter
  • effective thermal conductivity
  • heat transfer
  • porous media

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