Smoke Deposition Velocity in Industrial Fire Environments

Abstract

Smoke deposition velocities, measured in a 1.0-m3 smoke exposure chamber, have been related to the decay in local smoke exposure concentrations as well as the smoke particle characteristics. These velocities, on the order of 10-4 m/s, are consistent with previous experimental work in a large-scale 1200 m3 enclosure. Calculated deposition velocities are in reasonable agreement with measured values, but tend to be under-predicted, most likely due cloud settling effects associated with the smoke layer movement.