Improved Radiation and Combustion Routines for a Large Eddy Simulation Fire Model.
Improved Radiation and Combustion Routines for a Large
Eddy Simulation Fire Model.
McGrattan, K. B.; Floyd, J. E.; Forney, G. P.; Baum, H.
R.; Hostikka, S.
Fire Safety Science. Proceedings. Seventh (7th)
International Symposium. International Association for
Fire Safety Science (IAFSS). June 16-21, 2003,
Worcester, MA, Intl. Assoc. for Fire Safety Science,
Boston, MA, Evans, D. D., Editor(s), 827-838 pp, 2003.
fire research; fire models; combustion; equations;
propane; large scale fire tests; simulation
Improvements have been made to the combustion and
radiation routines of a large eddy simulation fire model
maintained by the National Institute of Standards and
Technology. The combustion is based on a single
transport equation for the mixture fraction with state
relations that reflect the basic stoichiometry of the
reaction. The radiation transport equation is solved
using the Finite Volume Method, usually with the gray
gas assumption for large scale simulations for which
soot is the dominant emitter and absorber. To make the
model work for practical fire protection engineering
problems, some approximations were made within the new
algorithms. These approximations will be discussed and
sample calculations presented.