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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