建筑室外风环境数值模拟的湍流模型比较  

Comparison of Turbulence Models for Numerical Simulation of Outdoor Wind Environment Around Building

作　　者：李琼[1] 持田灯[2] 孟庆林[1] 赵立华[1] 

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [2]日本东北大学建筑系

出　　处：《华南理工大学学报（自然科学版）》2011年第4期121-127,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学青年基金资助项目(51008127);重大国际(地区)合作研究项目(50720165805);广东省自然科学基金博士启动项目(10451064101005823);广东省自然科学基金重点项目(8251064101000006);高等学校博士学科点专项科研基金资助项目(20100172120006);华南理工大学中央高校基本科研业务费专项资金资助项目(2009ZM0088;2009ZZ0067);华南理工大学自然科学基金资助项目(x2jzE5090660)

摘　　要：对日本建筑学会提供的室外无污染物扩散和有污染物扩散的建筑风洞实验模型,采用15种湍流模型分别求解其室外流场,通过模拟结果与风洞实验结果的对比分析,确定建筑室外风环境数值模拟所用的最优湍流模型.结果表明,Suga三次式高Re k-ε模型对风场和浓度场的求解具有很高的精度,是最优的模拟室外风环境的湍流模型,不足之处是该模型的计算时间比标准k-ε模型长.因此,对建筑室外风环境进行CFD数值模拟时,在时间允许的情况下可采用Suga三次式高Re k-ε模型,在计算精度要求不高及计算时间有限的情况下,可采用标准k-ε模型.Aiming at the wind-tunnel experimental models with and without gas dispersion provided by the Architectural Institute of Japan（AIJ）,15 turbulence models are employed to simulate the outdoor wind environment.Then,by the comparison between the simulated results and the wind-tunnel experimental ones,the optimal turbulence model for the numerical simulation of outdoor wind environment around a building is determined.The results show that Suga＇s cubic high-Re k-ε model is the best due to its high accuracy of simulating both the air flow and the pollutant diffusion,but the CPU time of it is longer than that of the standard k-ε model.Thus,during the CFD numerical simulation of the outdoor wind environment of a building,Suga＇s cubic high-Re k-ε model can be used when the time is enough,and the standard k-ε model can be used when high accuracy is not required and when the calculation time is limited.

关 键 词：建筑 室外风环境 数值模拟 湍流模型 

分 类 号：TU311.3[建筑科学—结构工程]