Backdraft demonstration with Flashpoint Fire Dynamics Training Prop 

Creating a backdraft in the Flashpoint Fire Dynamics Training Prop. There is a small fire towards the middle of the prop driven by a bi-directional flow from the left bottom door. When the door on the right is opened, air is allowed to mix into the fuel-rich (vent limited) compartment. When enough air mixes in, and the mixture reaches the active fire a backdraft can be seen releasing a significant amount of energy in a short period of time.
Note that the graphic overlays are simplified to demonstrate the concepts and do not fully represent the complex fluid dynamics present.