ENFP 425 - Fire Modeling
- Permission from the Department
- Senior standing
- Karlsson, B., and J.G. Quintiere, Enclosure Fire Dynamics, CRC Press LLC, Boca Raton, 2000.
- Extensive course notes are also distributed to students.
- This course is an introduction to enclosure fire dynamics through the development of fire modeling algorithms and the application of computer-based fire modeling techniques.
This course provides:
- A basic understanding of enclosure fire dynamics with an emphasis on a system-level viewpoint (i.e., a global description of the coupling between combustion dynamics, smoke filling, vent flows and wall thermal losses)
- An introduction to the zone modeling approach and to the zone modeling software products used by professional engineers to simulate a building response to a fire event
- Introduction to enclosure fire dynamics: gas stratification and the formation of a smoke layer; fire growth and the possible transition to flashover and under-ventilated combustion; introduction to the two different approaches to computer-based fire modeling: zone modeling and CFD modeling.
- Mass and energy conservation and application to the two-layer description adopted in zone models. Compartment pressure dynamics.
- Combustion dynamics: fuel-limited and oxygen-limited combustion regimes; pre-flashover and post-flashover fire regimes; the concept of a global equivalence ratio; the concept of species yields to characterize the smoke layer composition and toxic emissions from the fire.
- Fuel sources: the concept of design fires; review of current methods/data to characterize the fire loads.
- Fire plumes: flame height correlations; ideal buoyant plume theory; extension to fire plumes; implications for zone models.
- Smoke filling: ceiling jet theory and activation of heat/smoke detectors; smoke venting systems.
- Vent flows: natural ventilation theory; stack effect in tall buildings; application to vent flows in compartment fires and smoke transport in buildings.
- Heat transfer processes: convective heat transfer; classical description of radiation exchanges between gray and diffuse surfaces in enclosures (with participating medium); coupled gas-solid heat transfer and description of wall heat losses in compartment fires; fire loading on building structure.
- Mathematical formulation of zone models: governing equations; input data (design fire, material thermal properties, species yields, etc)
- Numerical integration of the zone modeling equations (MATLAB)
- Introduction to zone modeling software used by professional engineers (e.g., CFAST or equivalent)