Preprints
https://doi.org/10.5194/gmd-2021-88
https://doi.org/10.5194/gmd-2021-88

Submitted as: model description paper 25 May 2021

Submitted as: model description paper | 25 May 2021

Review status: this preprint is currently under review for the journal GMD.

An emergency response model for evaluating the formation and dispersion of plumes originating from major fires (BUOYANT v4.20)

Jaakko Kukkonen, Juha Nikmo, Kari Riikonen, Ilmo Westerholm, Pekko Ilvessalo, Tuomo Bergman, and Klaus Haikarainen Jaakko Kukkonen et al.
  • Finnish Meteorological Institute, Erik Palménin aukio 1, P.O. Box 503, 00101, Helsinki, Finland

Abstract. A mathematical model called BUOYANT has previously been developed for the evaluation of the dispersion of positively buoyant plumes originating from major warehouse fires. The model addresses the variations of the cross-plume integrated properties of a rising plume in a vertically varying atmosphere and the atmospheric dispersion after the plume rise regime. We have described in this article an extension of the BUOYANT model to include a detailed treatment of the early evolution of the fire plumes, before the plume rise and atmospheric dispersion regimes. The model input and output consist of selected characteristics of forest or pool fires, and the properties of a source term for the plume rise module, respectively. The main model structure of this source term model is based on the differential equations for low-momentum releases of buoyant material, which govern the evolution of the plume radius, velocity and density differences. The model is also partially based on various experimental results on fire plumes. We have evaluated the refined BUOYANT model by comparing the model predictions against the experimental field-scale data of the Prescribed Fire Combustion and Atmospheric Dynamics Research Experiment, RxCADRE. The predicted concentrations of CO2 agreed fairly well with the aircraft measurements conducted in the RxCADRE campaign. We have also compiled an operational version of the model. The operational model can be used for emergency contingency planning and for the training of emergency personnel, in case of major forest and pool fires.

Jaakko Kukkonen et al.

Status: open (until 20 Jul 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Jaakko Kukkonen et al.

Jaakko Kukkonen et al.

Viewed

Total article views: 124 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
87 34 3 124 2 1
  • HTML: 87
  • PDF: 34
  • XML: 3
  • Total: 124
  • BibTeX: 2
  • EndNote: 1
Views and downloads (calculated since 25 May 2021)
Cumulative views and downloads (calculated since 25 May 2021)

Viewed (geographical distribution)

Total article views: 133 (including HTML, PDF, and XML) Thereof 133 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 15 Jun 2021
Download
Short summary
A mathematical model has been developed for the dispersion of plumes originating from major fires. We have refined the model for the early evolution of the fire plumes. We have evaluated the model against an experimental field-scale data. The predicted concentrations agreed well with the aircraft measurements. We have also compiled an operational version of the model. The operational model can be used for emergency contingency planning.