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Synchronized smoldering combustion
RISE - Research Institutes of Sweden, Safety and Transport, Fire Research Norway. Western Norway University of Applied Sciences, Norway ; Otto von Guericke University Magdeburg, Germany.ORCID iD: 0000-0003-0979-2369
Western Norway University of Applied Sciences, Norway.ORCID iD: 0000-0002-3119-9900
Western Norway University of Applied Sciences, Norway.ORCID iD: 0000-0002-4805-9007
2018 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 121, no 5, p. 50002-p1-50002-p2Article in journal, Letter (Refereed) Published
Abstract [en]

Synchronized, pulsating temperatures are observed experimentally in smoldering fires.The entire sample volume (1.8 l) participates in the pulsations (pulse period 2–4 h). The synchronylasts up to 25 h and is followed by a spontaneous transition to either disordered combustion orself-extinguishment. The synchronization is obtained when the fuel bed is cooled to the brink ofextinguishment. Calculations for adiabatic conditions, including heat generation from combustion(nonlinear in temperature) and heat storage in sample (linear in temperature), predict divergingsample temperature. Experimentally, heat losses to surroundings (linear in temperature) preventtemperatures to increase without bounds and lead to pulsations.

Place, publisher, year, edition, pages
2018. Vol. 121, no 5, p. 50002-p1-50002-p2
Keyword [en]
Fire, smoldering fire, industrial safety
Keyword [sv]
Brand, glödbrand, industri säkerhet
Keyword [no]
Brann, ulmebrann, industrisikkerhet
National Category
Other Engineering and Technologies Other Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33789DOI: 10.1209/0295-5075/121/50002OAI: oai:DiVA.org:ri-33789DiVA, id: diva2:1203579
Projects
Emerging Risks from Smoldering Fires
Available from: 2018-05-03 Created: 2018-05-03 Last updated: 2018-05-07Bibliographically approved

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Fjellgaard Mikalsen, Ragni

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