Open Access

ARTICLE

Convection-Diffusion Model for Radon Migration in a Three-Dimensional Confined Space in Turbulent Conditions

by Shengyang Feng, Dongbo Xiong, Guojie Chen, Yu Cui, Puxin Chen

1 School of Resource Environment and Safety Engineering, University of South China, Hengyang, 421001, China
2 Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment, Hengyang, 421001, China
3 Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining and Metallurgy, Hengyang, 421001, China
4 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
5 School of Civil Engineering, University of South China, Hengyang, 421001, China

* Corresponding Author: Shengyang Feng. Email:

(This article belongs to the Special Issue: The Progress in Building Indoor Air Quality: Indoor Airflow and Pollutant Control)

Fluid Dynamics & Materials Processing 2020, 16(3), 651-663. https://doi.org/10.32604/fdmp.2020.07981

Received 17 July 2019; Accepted 14 March 2020; Issue published 25 May 2020

Abstract

Convection and diffusion are the main factors affecting radon migration. In this paper, a coupled diffusion-convection radon migration model is presented taking into account turbulence effects. In particular, the migration of radon is simulated in the framework of the k-ε turbulence model. The model equations are solved in a complex 3D domain by the finite element method (FEM). Special attention is paid to the case study about radon migration in an abandoned air defense shelter (AADS). The results show that air convection in a confined space has a great influence on the radon migration and the radon concentration is inversely proportional to the wind speed.

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