A CFD INVESTIGATION INTO THE DISPERSION OF RADIONUCLIDES WITHIN THE STREET CANYON

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review

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Detail(s)

Original languageEnglish
Pages1155-1165
Number of pages11
Publication statusPublished - Oct 2020

Conference

TitleInternational Topical Meeting on Advances in Thermal Hydraulics (ATH '20)
PlaceFrance
CityPalaiseau
Period20 - 23 October 2020

Abstract

Most adverse effects of accident-released radionuclides on human beings, land and water are taken place through atmospheric dispersion. Understanding the spatial and temporal behaviors of radionuclides in the atmosphere is essential. Generally, the dispersion is categorized by the distance scale (range) and various numerical models are powerful tools to determine the dispersion field of the corresponding scale. However, most local-scale numerical studies are carried out for the dispersion of gaseous pollutants, which are usually modeled as scalars. To better characterize the dispersion of radionuclides, we consider the interphase effects, such as the drag force, lift force and the solid shear viscosity. The dispersion of radionuclides within the street canyon, which is one the most popular building structures, is numerically investigated by the CFD approach. Large eddy simulation (LES) model is applied to solve the turbulence flow. The proposed model is validated by experiments and simulation results. The flow structures and the accumulation of radionuclides in the street canyon with different aspect ratios are discussed in detail.

Research Area(s)

  • Atmospheric dispersion, Radionuclides, Computational fluid dynamics (CFD), Large eddy simulation (LES)

Bibliographic Note

Information for this record is supplemented by the author(s) concerned.

Citation Format(s)

A CFD INVESTIGATION INTO THE DISPERSION OF RADIONUCLIDES WITHIN THE STREET CANYON. / Cai, Junjie; Zhao, Jiyun; Cheng, Haimei; Zi, Shuangfei; Xiao, Jinchao.

2020. 1155-1165 Paper presented at International Topical Meeting on Advances in Thermal Hydraulics (ATH '20), Palaiseau, France.

Research output: Conference Papers (RGC: 31A, 31B, 32, 33)32_Refereed conference paper (no ISBN/ISSN)peer-review