Simulation of cross-contamination in high-rise buildings under wind-thermal coupling effects based on orthogonal experimental method

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Apr.2025, Vol.48 No.4: 439-446, 454

DOI: 10.3969/j.issn.1003-5060.2025.04.002

Authors

REN Keyu $ ^{1} $, LIU Xiaoping $ ^{1} $, WU Mei $ ^{2} $, YANG Manjiang $ ^{3} $, HU Linxiang $ ^{4} $

(1. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China; 2. Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei 230031, China; 3. China Ship Development and Design Center, Wuhan 430070, China; 4. China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610095, China)

Abstract and Keywords

Abstract: This study investigates the dispersion of gaseous pollutants in high-rise building environments through computational fluid dynamics (CFD) numerical simulations coupled with orthogonal experimental design. The impact of four key factors, source location, heated wall temperature difference, heated wall position and ventilation method, on the inter-unit pollutant dispersion pathways in high-rise buildings is analyzed in the presence of wind-thermal coupling effects. Range analysis is applied to assessing the significance of the influence of each factor on the inter-unit pollutant dispersion in high-rise buildings. By introducing the dimensionless parameter, the Richardson number $ R_{i} $, this study subdivides intervals $ 0.1 < R_{i} < 10.0 $, conventionally regarded as challenging for determining the dominance of forced convection versus natural convection. The influence mechanisms of various factors on pollutant dispersion in high-rise buildings within each of these intervals are analyzed. The findings indicate the pronounced influence of ventilation method on pollutant aggregation, the influence of heated wall position is greater than that of heated wall temperature difference in intervals 0.5.

Keywords: orthogonal experimental method; computational fluid dynamics(CFD); high-rise building; pollutant

作者信息

任柯宇 $ ^{1} $，刘晓平 $ ^{1} $，吴梅 $ ^{2} $，杨满江 $ ^{3} $，胡淋翔 $ ^{4} $

（1. 合肥工业大学土木与水利工程学院，安徽合肥 230009；2. 合肥综合性国家科学中心能源研究院（安徽省能源实验室），安徽合肥 230031；3. 中国舰船研究设计中心，湖北武汉 430070；4. 中国建筑西南设计研究院有限公司，四川成都 610095）

摘要和关键词

摘要: 针对高层建筑环境下的气相污染物传播问题,文章采用计算流体动力学(computational fluid dynamics, CFD)数值模拟方法并引入正交试验法进行方案设计,研究风-热耦合效应下源项位置、受热壁面温差、受热壁面位置、通风方式4种因素对高层建筑单元间污染物传播路径的影响,利用极差分析得出各因素对高层建筑单元间污染物扩散影响的显著程度排序。引入无量纲参数理查森数 $ R_{i} $,对常规认为难以判定强制对流还是自然对流占主导地位的 $ 0.1

关键词: 正交试验法；计算流体动力学(CFD)；高层建筑；污染物

Funding

国家自然科学基金资助项目（52274184）

合肥工业大学学报(自然科学版)

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