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FDS-simuleringar av anlagd brand på utsida av en fasad på enplansbyggnad med ventilerad

Blomstrand, Jonatan (2015) In LUTVDG/TVBB VBRM01 20112
Division of Fire Safety Engineering
Abstract
In this thesis three methods to predict smoke spread thorough small ventilation openings for the CFD field model FDS 5 are evaluated. The methods have been applied to several experiments where smoke spread in to the attic through ventilation openings in the eave have been studied.
The obtained result shows that the applied methods are not adequate for heat release rates less than 140 kW. The required cell size for lower heat release rates are currently not practically possible to apply with the available resources for a general FDS user. The computational
meshes applied in the zone from the fire source to the ventilation opening need to obtain the required cell size for the model to generate reliable results. According to the obtained... (More)
In this thesis three methods to predict smoke spread thorough small ventilation openings for the CFD field model FDS 5 are evaluated. The methods have been applied to several experiments where smoke spread in to the attic through ventilation openings in the eave have been studied.
The obtained result shows that the applied methods are not adequate for heat release rates less than 140 kW. The required cell size for lower heat release rates are currently not practically possible to apply with the available resources for a general FDS user. The computational
meshes applied in the zone from the fire source to the ventilation opening need to obtain the required cell size for the model to generate reliable results. According to the obtained result one of the three methods, named homogeneous cell size, are considered the most reliable, it is also adequate for lower heat release rates than the method called multiple mesh size. The obtained results show that the third method, called the leakage method, underestimates the amount of smoke spread through the eave into the attic. Therefore this method is not applicable for modeling of smoke spread through small openings. (Less)
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author
Blomstrand, Jonatan
supervisor
organization
alternative title
FDS simulations of arson fire outside the façade of one storey building with ventilation
course
VBRM01 20112
year
type
M2 - Bachelor Degree
subject
keywords
Anlagd brand, enplansbyggnad, ventilerad takfot, Fire Dynamics Simulator, FDS, arson fire, one storey building, ventilation opening, eave
publication/series
LUTVDG/TVBB
report number
5445
ISSN
1402-3504
language
Swedish
id
4985889
date added to LUP
2015-01-26 13:28:13
date last changed
2015-01-26 13:28:13
@misc{4985889,
  abstract     = {In this thesis three methods to predict smoke spread thorough small ventilation openings for the CFD field model FDS 5 are evaluated. The methods have been applied to several experiments where smoke spread in to the attic through ventilation openings in the eave have been studied.
The obtained result shows that the applied methods are not adequate for heat release rates less than 140 kW. The required cell size for lower heat release rates are currently not practically possible to apply with the available resources for a general FDS user. The computational
meshes applied in the zone from the fire source to the ventilation opening need to obtain the required cell size for the model to generate reliable results. According to the obtained result one of the three methods, named homogeneous cell size, are considered the most reliable, it is also adequate for lower heat release rates than the method called multiple mesh size. The obtained results show that the third method, called the leakage method, underestimates the amount of smoke spread through the eave into the attic. Therefore this method is not applicable for modeling of smoke spread through small openings.},
  author       = {Blomstrand, Jonatan},
  issn         = {1402-3504},
  keyword      = {Anlagd brand,enplansbyggnad,ventilerad takfot,Fire Dynamics Simulator,FDS,arson fire,one storey building,ventilation opening,eave},
  language     = {swe},
  note         = {Student Paper},
  series       = {LUTVDG/TVBB},
  title        = {FDS-simuleringar av anlagd brand på utsida av en fasad på enplansbyggnad med ventilerad},
  year         = {2015},
}