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3. Two canonical situations
3.1 Two-layer description
Up to now, we have only considered cases where the quantities were assumed to be homogeneous in the fire room, with a purely thermodynamic vision. In reality, as soon as a fire develops, the hot smoke tends to rise and settle in a homogeneous layer under the ceiling, above a layer of fresh air kept at the bottom as long as the fire is sufficiently ventilated. After considerations common to all two-layer flows, two canonical situations are successively considered: the case of an imposed extraction flow corresponding to mechanical smoke extraction, then the case of natural smoke extraction. These situations are canonical in the sense that between them they contain all the ingredients to be taken into account in all real cases.
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Two canonical situations
Numerical simulation and smoke control engineering
Bibliography
Standards and norms
- Fire threat to people and environment. - ISO/TC 92/SC 3 - 1980
- Fire safety engineering. - ISO/TC 92/SC 4 - 1991
- Fire safety engineering – Requirements for algebraic equations – Part 1: General requirements. - ISO 24678-1 :2019 - Mars 2019
- Fire safety engineering – Algebraic formula requirements – Part 6: Flashover phenomena. - ISO 24678-6 :2016 - Août 2016
The standards issued...
Websites
International Association for the Study of Insurance Economics
http://www.genevaassociation.org
Airtightness of buildings
http://www.rt-batiment.fr/l-etancheite-a-l-air-des-batiments-a31.html
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