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基于Fluent城市大气污染物扩散数值模拟

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杨志斌, 袁德奎. 基于Fluent城市大气污染物扩散数值模拟[J]. 环境工程学报, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
引用本文: 杨志斌, 袁德奎. 基于Fluent城市大气污染物扩散数值模拟[J]. 环境工程学报, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
shu
Yang Zhibin, Yuan Dekui. Numerical simulation of atmospheric pollutants dispersion in urban based on Fluent[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
Citation: Yang Zhibin, Yuan Dekui. Numerical simulation of atmospheric pollutants dispersion in urban based on Fluent[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
shu

基于Fluent城市大气污染物扩散数值模拟

  • 1.

    天津大学力学系, 天津 300072

  • 基金项目:

    教育部新世纪优秀人才支持计划(NCET-12-0406)

  • 中图分类号: X169

Numerical simulation of atmospheric pollutants dispersion in urban based on Fluent

  • 1.

    Department of Mechanics, Tianjin University, Tianjin 300072, China

  • Fund Project:

  • 摘要: 城市大气污染问题已经引起广泛的关注,其中对城市中大气污染物的迁移扩散过程还需进一步研究。为了探究城市复杂地形下大气污染物扩散预测的新模式,采用计算流体力学方法,建立了数值预测模型,构造出水平均匀的大气边界层模拟风场;进一步对建筑物影响下的大气污染物扩散过程进行了模拟,并与实验结果进行了对比。结果表明:数值模拟结果与实验结果基本吻合,计算流体力学方法可用于城市复杂地形下大气污染问题的研究工作;模拟结果与湍流模型的选取和湍流施密特数的设置有密切关系;采用SST k-ω湍流模型对此类问题较适宜,随着湍流施密特数的增大,扩散范围逐渐增大。
    Abstract: Atmospheric pollution in urban areas has aroused wide interest, and the dispersion mechanism of atmospheric pollutants still needs further study. In order to explore a new forecast model for atmospheric pollutant dispersion in urban areas with complex terrains, a numerical model based on the computational fluid dynamics (CFD) method is presented in this paper. A horizontally homogeneous atmospheric boundary layer (ABL) was first constructed using the model. Then the dispersion of atmospheric pollutants due to buildings was simulated and the numerical results were compared against the experimental data. The numerical results agreed reasonably well with the experimental data, and the computational fluid dynamics method can, therefore, be applied to research on urban atmospheric pollution problems in complex terrains. The numerical results were affected by the choice of turbulence model and the Schmict number. The SST k-ω turbulence model is suitable for such problems, and the dispersion area increases gradually as the Schmict number rises.
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出版历程
  • 收稿日期:  2014-12-22
  • 刊出日期:  2016-03-18
杨志斌, 袁德奎. 基于Fluent城市大气污染物扩散数值模拟[J]. 环境工程学报, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
引用本文: 杨志斌, 袁德奎. 基于Fluent城市大气污染物扩散数值模拟[J]. 环境工程学报, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
shu
Yang Zhibin, Yuan Dekui. Numerical simulation of atmospheric pollutants dispersion in urban based on Fluent[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
Citation: Yang Zhibin, Yuan Dekui. Numerical simulation of atmospheric pollutants dispersion in urban based on Fluent[J]. Chinese Journal of Environmental Engineering, 2016, 10(3): 1365-1369. doi: 10.12030/j.cjee.20160358
shu

基于Fluent城市大气污染物扩散数值模拟

  • 1. 天津大学力学系, 天津 300072
  • 收稿日期:  2014-12-22
基金项目:

教育部新世纪优秀人才支持计划(NCET-12-0406)

摘要: 城市大气污染问题已经引起广泛的关注,其中对城市中大气污染物的迁移扩散过程还需进一步研究。为了探究城市复杂地形下大气污染物扩散预测的新模式,采用计算流体力学方法,建立了数值预测模型,构造出水平均匀的大气边界层模拟风场;进一步对建筑物影响下的大气污染物扩散过程进行了模拟,并与实验结果进行了对比。结果表明:数值模拟结果与实验结果基本吻合,计算流体力学方法可用于城市复杂地形下大气污染问题的研究工作;模拟结果与湍流模型的选取和湍流施密特数的设置有密切关系;采用SST k-ω湍流模型对此类问题较适宜,随着湍流施密特数的增大,扩散范围逐渐增大。

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