CFD modeling of pollution dispersion in a street canyon: Comparison between LES and RANS

被引：242

作者：

Tominaga, Yoshihide ^{[1
]}

Stathopoulos, Ted ^{[2
]}

机构：

[1] Niigata Inst Technol, Dept Architecture & Bldg Engn, Niigata 9451195, Japan

[2] Concordia Univ, Ctr Bldg Studies, Dept Bldg Civil & Environm Engn, Montreal, PQ H3G 1M8, Canada

来源：

JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS | 2011年 / 99卷 / 04期

关键词：

CFD; Pollutant dispersion; Street canyon; LES; RANS; LARGE-EDDY SIMULATION; NUMERICAL-SIMULATION; TURBULENCE MODELS; BUILDING MODEL; AIR-QUALITY; WIND-TUNNEL; PART I; FLOW; FIELD; ENVIRONMENT;

D O I：

10.1016/j.jweia.2010.12.005

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

CFD modeling using RANS and LES of pollutant dispersion in a three-dimensional street canyon is investigated by comparison with measurements. The purpose of this study is to confirm the accuracy of LES in modeling plume dispersion in a simple street canyon model and to clarify the mechanism of the discrepancy in relation to RANS computation. Simple LES modeling is shown by comparison with wind tunnel experiments to give better results than conventional RANS computation (RNG) modeling of the distribution of mean concentration. The horizontal diffusion of concentration is well reproduced by LES, mainly due to the reproduction of unsteady concentration fluctuations in the street canyon. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：340 / 348

页数：9

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