The Influence of Human Activities on Pollutants Distribution in Waiting Rooms of Outpatients in Health Care Buildings

Unsteady CFD simulation with SST k-ε model and dynamic mesh was used to investigate the characteristics of human walking and how the human activities influence the pollutants distribution in outpatient waiting rooms of health care buildings in this study. The results show that apart from the differences of gender and age, the movement speed of personnel is also greatly influenced by the subjective factors, and the step size is obviously less affected by the subjective factors and greatly affected by physical health and body shape. Numerical simulation results show that when the fine mannequin is used, the wake produced by the forward movement of the leg is obviously smaller than the wake area after the body and arm. The pollutants are enabled to diffuse faster but without increasing the concentration because of swinging the hands and feet of the moving human body, the thermal plume of the body, and the faster moving persons. When moving the same distance, the concentration of contaminant caused by the wake behind the body changes the same.