LES and RANS comparison of flow and pollutant dispersion in urban environment

被引：5
|
作者：
Mazarakis N. [1 ]
Kaloudis E. [2 ]
Nazos A. [3 ]
Nikas K.-S.P. [1 ]
机构：
[1] Mechanical Engineering Department, Fluid Mechanics Laboratory, Technological Education Institute of Piraeus, 250 Thivon & P. Ralli ave., Egaleo
[2] Solar and Other Energy Systems Laboratory, National Center for Scientific Research Demokritos
[3] Mechanical Engineering Department, Heat Transfer Laboratory, Technological Education Institute of Piraeus, 250 Thivon & P. Ralli ave., Egaleo
来源：
Nikas, Konstantinos-Stefanos P. (ksnikas@teipir.gr) | 1600年 / Routledge卷 / 73期
关键词：
LES; Pollutant dispersion; RANS; Street canyon;
D O I：
10.1080/00207233.2015.1082251
中图分类号：
学科分类号：
摘要：
This study investigates air pollution dispersion in urban areas by means of Computational Fluid Dynamics (CFD). The commercial CFD software FLUENT was used to implement two different turbulence simulation methods (RANS and LES), in domains similar to complex urban environments. Particularly, different combinations of roof shapes were studied and simulation results of pollutant (ethane) concentrations were compared against experimental data. The building height (H) to the neighbour building distance (B) ratio was also taken into consideration. Previous studies showed that both RANS and LES models are accurate enough to predict pollutant concentrations fields in B/H = 1. In the present study the incapability of RANS models to predict accurately pollutant concentration in B/H = 0.5 for all roof shapes configurations is revealed. © 2015 Taylor & Francis.
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页码：48 / 65
页数：17
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