Nonlinear dynamic analysis of natural ventilation in a two-zone building: Part B - CFD simulations

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	Nonlinear dynamic analysis of natural ventilation in a two-zone building: Part B - CFD simulations
	Yang, LN ; Li, YG ; Xu, PC; Zhang, GQ
	2006-04-01
发表期刊	HVAC&R RESEARCH
ISSN	1078-9669
卷号	12 期号:2 页码:257-278
摘要	Computational fluid dynamics (CFD) is a widely accepted design and analysis tool for building ventilation. This paper presents a simple method using commercial CFD software to obtain the solution multiplicity characteristics of laminar and turbulent indoor airflows. The method is known as the two-way continuation simulation, which has been developed for identifying multiple solutions in computational fluid dynamics. We consider airflows in a simple two-zone building with four openings, where one of the zones has a constant heat source, modeling the heat or pollutant generation and spread in buildings governed by natural stack forces. Using the new two-way continuation simulation method, we describe the flow variation and physical mechanisms at different heights in the two zones for different Rayleigh numbers. The results show that two steady solutions with the same boundary conditions and building geometry can be obtained step-by-step in the simulation process. Flow multiplicity can also be found as the height ratio of the two zones increases or decreases. As an important physical parameter, the Rayleigh number can also have some significant influences on the flow bifurcation or variation. Compared with conventional CFD simulation, the two-way continuation simulation method can effectively identify the possible existence of multiple solutions of indoor airflows and pollutant spread with different initial conditions. One shortcoming of the two-way method is that it cannot identify unstable solutions.
语种	英语
WOS研究方向	Thermodynamics ; Construction & Building Technology ; Engineering
WOS类目	Thermodynamics ; Construction & Building Technology ; Engineering, Mechanical
WOS记录号	WOS:000236868200005
出版者	AMER SOC HEATING REFRIGERATING AIR-CONDITIONING ENG, INC,
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/3697
专题	应用数学研究所
通讯作者	Yang, LN
作者单位	1.Univ Hong Kong, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Appl Math, Beijing, Peoples R China 3.Hunan Univ, Coll Civil Engn, Changsha, Peoples R China
推荐引用方式 GB/T 7714	Yang, LN,Li, YG,Xu, PC,et al. Nonlinear dynamic analysis of natural ventilation in a two-zone building: Part B - CFD simulations[J]. HVAC&R RESEARCH,2006,12(2):257-278.
APA	Yang, LN,Li, YG,Xu, PC,&Zhang, GQ.(2006).Nonlinear dynamic analysis of natural ventilation in a two-zone building: Part B - CFD simulations.HVAC&R RESEARCH,12(2),257-278.
MLA	Yang, LN,et al."Nonlinear dynamic analysis of natural ventilation in a two-zone building: Part B - CFD simulations".HVAC&R RESEARCH 12.2(2006):257-278.