Advanced

Validation of FDS for large-scale well-confined mechanically ventilated fire scenarios with emphasis on predicting ventilation system behavior

Wahlqvist, Jonathan LU and Van Hees, Patrick LU (2013) In Fire Safety Journal 62. p.102-114
Abstract
Use of computational fluid dynamics (CFD) software packages within fire performance based engineering and risk assessment is increasing substantially. An important part in the process is validation and verification in order to be able to assess the accuracy and reliability of the computational tools. To improve the credibility of using CFD modeling in several high-consequence fields, such as the nuclear safety area, more work must be done. Fires in enclosures equipped with forced (or mechanical) interconnecting ventilation remain one of the key issues for fire safety assessment in the nuclear industry. The scenario of a fire in a confined and ventilated enclosure is a typical hazard during which the pressure may vary to an extent where it... (More)
Use of computational fluid dynamics (CFD) software packages within fire performance based engineering and risk assessment is increasing substantially. An important part in the process is validation and verification in order to be able to assess the accuracy and reliability of the computational tools. To improve the credibility of using CFD modeling in several high-consequence fields, such as the nuclear safety area, more work must be done. Fires in enclosures equipped with forced (or mechanical) interconnecting ventilation remain one of the key issues for fire safety assessment in the nuclear industry. The scenario of a fire in a confined and ventilated enclosure is a typical hazard during which the pressure may vary to an extent where it modifies the confinement levels and hence the safety of the installation. An understanding of the mechanisms leading to pressure variations during a fire scenario is of prime interest. In this paper an attempt to simulate several large-scale well-confined mechanically ventilated fire scenarios using Fire Dynamics Simulator (FDS) is presented. Full-scale experiments that have been performed within the PRISME project are compared to simulations done using a pre-release version of FDS 6. The behavior of the HVAC system has been the main focus in the comparison and it is demonstrated that FDS 6 is capable of predicting pressure induced phenomena in the ventilation system, both at inlets and exhausts, with satisfactory accuracy. (C) 2013 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fire, CFD, FDS, Mechanical ventilation, HVAC, Validation
in
Fire Safety Journal
volume
62
pages
102 - 114
publisher
Elsevier
external identifiers
  • wos:000329273800003
  • scopus:84889083749
ISSN
0379-7112
DOI
10.1016/j.firesaf.2013.07.007
language
English
LU publication?
yes
id
05bb9a2f-15b5-4fdf-ab41-a38652d83d44 (old id 4320137)
date added to LUP
2014-02-26 14:45:00
date last changed
2019-10-15 04:36:05
@article{05bb9a2f-15b5-4fdf-ab41-a38652d83d44,
  abstract     = {Use of computational fluid dynamics (CFD) software packages within fire performance based engineering and risk assessment is increasing substantially. An important part in the process is validation and verification in order to be able to assess the accuracy and reliability of the computational tools. To improve the credibility of using CFD modeling in several high-consequence fields, such as the nuclear safety area, more work must be done. Fires in enclosures equipped with forced (or mechanical) interconnecting ventilation remain one of the key issues for fire safety assessment in the nuclear industry. The scenario of a fire in a confined and ventilated enclosure is a typical hazard during which the pressure may vary to an extent where it modifies the confinement levels and hence the safety of the installation. An understanding of the mechanisms leading to pressure variations during a fire scenario is of prime interest. In this paper an attempt to simulate several large-scale well-confined mechanically ventilated fire scenarios using Fire Dynamics Simulator (FDS) is presented. Full-scale experiments that have been performed within the PRISME project are compared to simulations done using a pre-release version of FDS 6. The behavior of the HVAC system has been the main focus in the comparison and it is demonstrated that FDS 6 is capable of predicting pressure induced phenomena in the ventilation system, both at inlets and exhausts, with satisfactory accuracy. (C) 2013 Elsevier Ltd. All rights reserved.},
  author       = {Wahlqvist, Jonathan and Van Hees, Patrick},
  issn         = {0379-7112},
  keyword      = {Fire,CFD,FDS,Mechanical ventilation,HVAC,Validation},
  language     = {eng},
  pages        = {102--114},
  publisher    = {Elsevier},
  series       = {Fire Safety Journal},
  title        = {Validation of FDS for large-scale well-confined mechanically ventilated fire scenarios with emphasis on predicting ventilation system behavior},
  url          = {http://dx.doi.org/10.1016/j.firesaf.2013.07.007},
  volume       = {62},
  year         = {2013},
}