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Improvements to the NIST Fire Dynamics Simulator



Kevin B. McGrattan, J E. Floyd, Glenn P. Forney, Howard R. Baum, Simo A. Hostikka


A new version of the NIST Fire Dynamics Simulator (FDS) was released in the fall of 2001. Improvements have been made to the combustion and radiation routines, allowing for better simulation of flashover. 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 in which soot is the dominant emitter and absorber. To make the model work for practical fire protection engineering problems, some approximations have to be made within the new algorithms. These approximations will be discussed and sample calculations presented.
IAFSS Symposium


fire model, large eddy simulation, mixture fraction


McGrattan, K. , Floyd, J. , Forney, G. , Baum, H. and Hostikka, S. (2003), Improvements to the NIST Fire Dynamics Simulator, IAFSS Symposium, [online], (Accessed May 23, 2024)


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Created January 1, 2003, Updated June 2, 2021