What term describes the circulation of hot gases and fluids during a fire?

Convection refers to the process of heat transfer that occurs through the movement of fluids, which includes both liquids and gases. In the context of a fire, hot gases and fluids rise due to their lower density compared to cooler air. As the hot gases rise, they create a circulation pattern, drawing cooler air in from the surroundings. This movement significantly contributes to the spread of heat and smoke within a structure, influencing both the intensity of the fire and the safety of occupants. Understanding convection is crucial for firefighters, as it aids in anticipating fire behavior and implementing effective suppression strategies.

Other terms relate to different mechanisms of heat transfer; conduction refers to heat transfer through direct contact, radiation involves energy transfer through electromagnetic waves, and diffusion pertains to the movement of particles from an area of high concentration to one of low concentration, which is not primarily how heat spreads in a fire scenario.