Full-Scale CFD Simulation of Gypsum Plasterboard Wall Assemblies Exposed to Fire: Effects of Gypsum Dehydration

Dionysios Kolaitis, Eleni Asimakopoulou, Maria Founti

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Gypsum “dehydration” phenomena, occurring when gypsum plasterboard wall assemblies are exposed to a high temperature environment, result in water vapour production and subsequent dispersion in the fire compartment; however, these phenomena are commonly neglected in relevant Computational Fluid Dynamics (CFD) simulations. In order to investigate the impact of gypsum dehydration in full-scale CFD simulations of gypsum plasterboard wall assemblies, the FDS code is used to simulate a two-storey residential building, exposed to a typical domestic fire scenario. A structural steel frame is used in the investigated building, combined with gypsum plasterboard wall assemblies. The effects of gypsum dehydration are taken into account by using a dedicated solid reaction kinetics model; the obtained predictions are compared to a benchmark test case where no such phenomena are modelled. The performed simulations clearly indicate that the explicit simulation of gypsum dehydration
phenomena has a prominent effect on CFD predictions; the developed solid reaction kinetics model allows, for the first time, the CFD simulation of gypsum dehydration induced water vapour production and dispersion in the fire compartment.
Original languageEnglish
Number of pages20
Publication statusPublished (in print/issue) - 2012
EventInternational Conference of Fire Computer Modeling - University of Cantambria, Santander, Spain
Duration: 18 Oct 201219 Oct 2012


ConferenceInternational Conference of Fire Computer Modeling
Internet address


  • CFD
  • Gypsum dehydration
  • gypsum plasterboard
  • Fire


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