CFD Simulation of Multiple Solutions of Smoke Flow in a Simple Building
As for a simple single-zone building on fire under an opposing wind with one small top opening on one side and one small bottom opening on the other side, computational fluid dynamics (CFD) using Fluent software is employed to simulate smoke mass flow rate and smoke flow direction. A two-way simulation approach is used in the simulation to consider the effect of different initial conditions. The simulation results are compared with previous macroscopic analysis in Gong and Li (2008), and they fit well with macroscopic analysis. A hysteresis phenomenon is found during the process of simulation, streamlines and isotherm contours for both the buoyancy-dominated flow and the winddominated flow under the same wind speed and fire power are then given to validate the existence of multiple solutions of smoke flow. The effect of multiple solutions of smoke flow on the smoke control is finally discussed in realistic situations. The existence of solution multiplicity of smoke flow in a simple building shows that a further study of more complex and realistic situations is necessary.
Smoke flow Multiple solutions Opposing wind CFD Initial conditions Two-way simulation Hysteresis
Jian Gong Yuguo Li
Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,China
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
1317-1323
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）