FIRDEMND simulates the suppression of post flashover
charring and non-charring solid-fuel fires in compartments
using water sprays from portable hose-nozzle equipment
used by the fire departments. The output of the Fire
Demand Model (FDM) shows the extinguishing effects
of water spray at various flow rates and droplet sizes.
The calculations are based on a heat and mass balance
accounting for gas and surface cooling, steam-induced
smothering, water-spray induced air entrainment, direct
extinguishment of the fire by water and the energy
transport via inflow and outflow of heat and products
of combustion. This model can be complicated, but
it is very powerful.