Study On The Effect Of Human Activities On Indoor Air-flow And Contaminants Distribution

Indoor air quality (IAQ) is certified to significantly affect the human health andmany studies had focused on IAQ these years. Influence of human body movement tothe indoor environment is a new field on IAQ. However, few works had provideddetailed conclusion of influence of motion factors on indoor environment, which iscritical to get a clear understanding in practise.We introduced the experimental and numerical simulated results of the influence ofmoving human body on indoor air-flow and contaminants distribution. Dimensionalanalysis then provided empirical correlations to calculate the change of air-flow fieldquickly. The main works of this thesis are summarized as below:An experiment was performed in a real room, while a real human body moving inthe room. Ventilation rate and modes, moving speed of human body and frequency ofhuman body movement were controlled in the experiment and the changes of air-flowfield and contaminant distribution were measured.Computational Fluid Dynamics (CFD) was employed to numerically modelling theair distribution under the condition of human body moving. After validation of the CFDmodel, the air flow field and contaminant distribution were modelled with the CFDmodel under the cases where the ventilation modes, moving speed and frequency ofhuman body movement varies in reasonable ranges.Through dimensional analysis we introduced eight main similarity criterions todescribe the influence of human body movement. Seven empirical correlations wereproposed on the basis of simulation results.Empirical correlations were used in two cases to predict the influence of humanbody movement on indoor environment. The results were compared with theexperimental and numerical results to validate the conclusion.