Numerical simulation of indoor toxic or harmful gas diffusion

Simulates the air flow in a ventilated model room and the concentration field of CO₂ as a tracer gas released from a fixed point source using the CFD method based on the RNG K-ε turbulence model. Discusses the effects of air supply velocity and releasing source location on the concentration field. The simulation results of air velocity field are accordant with the flow visualization results from a literature.