Numerical Investigation of Carbon Dioxide Diffusion in Indoor Hypobaric Atmosphere

The hypo baric atmosphere at high altitude has very negative effects on human´s physiology and health. In the present paper, by considering human´s respiration capacity and component, the RNG k-ε turbulent model was developed to study the heat transfer and CO₂ diffusion of indoor air in the hypo baric atmosphere. The results show that as the pressure decreases, the CO₂ diffusion tends to be weak, leading to an increasing CO₂ concentration. But raising the supplied air flow speed helps to improve the CO₂ diffusion and hence indoor air quality.