Salt Water Simulation of the Movement Characteristics of Smoke and Induced Air in a Room-Corridor Building
This chapter discusses the fundamental mechanisms of smoke and entrained air flow and the method of salt water simulation in detail. A salt water simulation and the double-liquid-dyeing technique have been applied to study the characteristic movement of smoke and induced air in a corridor adjoining a room. The occurrence of stratified smoke and air layers in the corridor was verified and the interaction between the two layers determined to be negligible. A room-corridor arrangement is one of the most common features of buildings and plays a fundamental role in the spread of smoke during a fire. The movement velocities of the salt water and the fresh water in the corridor model were measured with variable salt water source positions, densities, and injection mass fluxes and the results obtained are illustrated. The main factors controlling the thickness of the salt water layer are the mass flux, position, and normalized density of the salt water.