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Fire Modeling Programs

LAVENT

LAVENT is a program developed to simulate the environment and the response of sprinkler links in compartment fires with draft curtains and fusible link operated ceiling vents. The model, used to calculate the heating of the fusible links, includes the effects of the ceiling jet and the upper layer of hot gases beneath the ceiling. The required program inputs are the geometrical data describing the compartment, the thermophysical properties of the ceiling, the fire elevation, the time dependent energy release rate of the fire, the fire diameter or energy release rate per area of the fire, the ceiling vent area, the fusible link response-time-index (RTI) and fuse temperature, the fusible link positions along the ceiling, the link assignment to each ceiling vent, and the ambient temperature. A maximum of five ceiling vents and ten fusible links are permitted in the compartment. The program outputs are the temperature, mass and height of the hot upper layer, the temperature of each link, the ceiling jet temperature and velocity at each link, the radial temperature distribution along the interior surface of the ceiling, the radial distribution of the heat flux to the interior and exterior surfaces of the ceiling, the fuse time of each link, and the vent area that has been opened. LAVENT is supported by two-part documentation which includes: Part I - Theory, L.Y. Cooper; and Part II - User Guide, W.D. Davis and L.Y. Cooper. LAVENT was written in FORTRAN by W.D. Davis and L.Y. Cooper.

GRAPH is a graphics program which runs in conjunction with LAVENT. The results for LAVENT are sent to the data file, GRAPH.OUT, after each prescribed time step. GRAPH then allows the user to choose two sets of variables to be plotted on the screen and has the additional capability of hardcopy output. GRAPH was written in FORTRAN by W.D. Davis.

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