Simple Fire Zone Model

Based on principles from CFAST (Consolidated Fire And Smoke Transport) model

Room and Fire Parameters

Room Length (m):

Room Width (m):

Room Height (m):

Maximum Fire Heat Release Rate (kW):

Fire Growth Rate: Slow (α = 0.003 kW/s²) Medium (α = 0.012 kW/s²) Fast (α = 0.047 kW/s²) Ultra-fast (α = 0.19 kW/s²)

Vent Width (m):

Vent Height (m):

Start Simulation Stop Simulation Reset

Room Visualization

Simulation Data

Property	Value
Simulation Time	0 s
Fire Heat Release Rate	0 kW
Upper Layer Temperature	20 °C
Lower Layer Temperature	20 °C
Interface Layer Height	2.4 m
Smoke Layer Depth	0 m

Temperature exceeds critical threshold!

About This Model

This is a simplified two-zone fire model based on principles similar to those used in CFAST (Consolidated Fire And Smoke Transport). It divides a room into two layers:

• Upper Layer - Hot gases and smoke that collect near the ceiling
• Lower Layer - Cooler, relatively smoke-free air below

The model calculates:

• Fire growth using a t-squared fire model
• Plume entrainment based on Heskestad's correlation
• Mass and energy conservation for zone temperatures
• Layer interface height based on mass conservation
• Basic ventilation effects

Note: This is a simplified educational model. For actual fire safety engineering, use validated tools like CFAST, FDS, or consult a fire protection engineer.