Experimental Study of Environment and Heat Transfer in a Room Fire. Mixing in Doorway Flows and Entrainment in Fire Plumes.
Experimental Study of Environment and Heat Transfer in a
Room Fire. Mixing in Doorway Flows and Entrainment in
Zukoski, E. E.; Kubota, T.; Lim, C. S.
NBS GCR 85-493; 173 p. May 1985.
Sponsor:National Bureau of Standards, Gaithersburg, MD
Available from: National Technical Information Service
(NTIS), Technology Administration, U.S. Department of
Commerce, Springfield, VA 22161.
1-800-553-6847 or 703-605-6000;
Order number: PB85-248755
bibliographies; building fires; ceilings; doors; gas
flow; gravity; heat transfer; room fires; gravity
This report contains a description of an ongoing study
of gravity currents for conditions which match those we
expect to find in unwanted fires in buildings. A review
is made of the pertinent literature and a description is
given of the flow regimes which can exist for ideal
gravity currents when viscous effects, heat transfer,
and mixing are ignored. The influence of boundary
conditions fixed by the method used to withdraw the
fluid displaced by the current is given. Algebraic
equations for the thickness of the current and the
velocity of the head are derived for these ideal flows.
The influences of viscosity and mixing are briefly
discussed and the status of salt water and gas modeling
experiments is given.