干旱区生态环境知识资源中心(Arid): CFD Simulation of Chemical Gas Dispersion Under Atmospheric Boundary Conditions

Arid

DOI	10.1142/S0219876219400115
	CFD Simulation of Chemical Gas Dispersion Under Atmospheric Boundary Conditions
	Xu, George; Lim, Arthur; Gopalan, Harish; Lou, Jing; Poh, Hee Joo
通讯作者	Xu, G (corresponding author), ASTAR, Fluid Dynam Dept, Inst High Performance Comp, Singapore, Singapore.
会议名称	International Conference on Computational Methods (ICCM)
会议日期	AUG 06-10, 2018
会议地点	Rome, ITALY
英文摘要	Pollutant control is one of the key concerns in the design of buildings, for the sake of occupational health, safety and environment sustainability. In particular, risk analyses related to emergency leakage of chemicals from storage tanks or chemical processes have aroused increasing attentions in recent days, as well as the effectiveness of mitigation measures in order to eliminate, reduce and control the risks. In this paper, a CFD methodology with nonreactive chemical gases treated as passive scalars has been developed to simulate the gas dispersion across urban environments, subject to atmospheric boundary layer wind conditions. Special treatments to maintain the consistency in atmospheric boundary layer flow profiles, turbulence modeling and boundary conditions have also been accounted for. The proposed CFD methodology for gas dispersion has been implemented in the open source CFD code - OpenFOAM. It has been validated by modeling the gas dispersions for two urban-related test cases: the CODASC street canyon test case measured in a laboratory wind tunnel and the Mock Urban Setting Test (MUST) field experiment conducted in the desert area of Utah State. Effects of turbulent Schmidt number (Sct) have been primarily addressed in this study. Statistical analyses about the discrepancies between predicted and experimental data have been carried out and statistical performance measures are used to quantify the accuracy of the proposed methodology. Simulations results from passive scalar transport equation demonstrate good agreement with experimental data, though tracer gases heavier than the atmospheric air were used in both the measurements. Furthermore, sensitivity tests also indicate that the accuracy of the simulation results is sensitive to the value of turbulent Schmidt number.
英文关键词	CFD gas dispersion OpenFOAM urban environment modeling
来源出版物	INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
ISSN	0219-8762
EISSN	1793-6969
出版年	2020
卷号	17
期号	5
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
类型	Article; Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000521156700011
WOS关键词	FLOW
WOS类目	Engineering, Multidisciplinary ; Mathematics, Interdisciplinary Applications
WOS研究方向	Engineering ; Mathematics
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/337006
作者单位	[Xu, George; Lim, Arthur; Gopalan, Harish; Lou, Jing; Poh, Hee Joo] ASTAR, Fluid Dynam Dept, Inst High Performance Comp, Singapore, Singapore
推荐引用方式 GB/T 7714	Xu, George,Lim, Arthur,Gopalan, Harish,et al. CFD Simulation of Chemical Gas Dispersion Under Atmospheric Boundary Conditions[C]:WORLD SCIENTIFIC PUBL CO PTE LTD,2020.