Abstract
This paper focuses on the results of computational fluid dynamics (CFD) modeling of radon concentration distribution in living areas within residences. The COMSOL Multiphysics® 5.3 software package has been employed for solving coupled momentum and species transport problems together with pseudo-reaction term modeling of the radon radioactive decay process. The reliability and verification of the simulation model was tested by comparing with available experimental data. The obtained results show the existence of stagnant zones where the concentration of radon is substantially higher than the average values. The impact of factors such as wind velocity, air tightness, and incoming radon flux were taken into consideration.
Highlights
It is considered that exposure to radon gas is the one of the primary causes of lung cancer, and the most important one for non-smokers
This paper focuses on the details of the mechanism of convection mixing in living areas that might cause pronounced non-uniformity of radon concentrations in buildings
The elevated concentrations are mainly observed in the corners; the reduced values are located in the center of the rooms and, as expected, near the windows at the windward side
Summary
It is considered that exposure to radon gas is the one of the primary causes of lung cancer, and the most important one for non-smokers. There is a serious hazard resulting from radon gases that are concentrated in the foundations of buildings and poorly ventilated areas [1]. Being a product of uranium decay, radon is released either from building materials [2,3] or from underground [1,4]. This paper focuses on the details of the mechanism of convection mixing in living areas that might cause pronounced non-uniformity of radon concentrations in buildings
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