The entrainment of air from the surrounding atmosphere in a rising fire plume has the effect of:
The entrainment of air from the surrounding atmosphere in a rising fire plume has the effect of:
The entrainment of air from the surrounding atmosphere into a rising fire plume will increase the total mass and volume of the plume. This is because more air is being added to the plume. This additional air cools the plume because the entrained air is relatively cooler than the fire plume. Additionally, the added air will dilute the concentration of fire products within the plume.
The turbulent flow at the interface between the hot (buoyant) fire plume and the surrounding cold air creates vortices which entrain fresh air into the plume, controlling the diffusion flame combustion characteristic scales and oscillations.