Numerical study of double-diffusive mixed convection of heavy gas in ventilation room

More than 90% of the toxic gas in industrial production process is heavy gas. However, under non-isothermal conditions, due to uncertainty direction buoyancy, traditional ventilation method cannot be used discharge heat and pollutants. In this study, we adopted numerical simulation. The model study a two-dimensional double-diffusion model. typical heavy-specific gravity sulphur hexafluoride (SF6) for When buoyancy ratio -1, diffusion law pollutants conditions discussed. results show that temperature distribution pollutant are mainly affected by size vortex on surface pollution source source. efficiency average Nu trend similar, put forward optimal intensity relational formula square cavity.