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Table 1 Previous literatures on the effects of human movement on contaminant transmission

From: Effect of human movement on airborne disease transmission in an airplane cabin: study using numerical modeling and quantitative risk analysis

Author, date Method Moving object Environment Contaminant Results
Bjørn and Nielsen [12] experiment a life-sized breathing thermal manikin full-scale test rooms tracer gas (dinitrogenoxide, N2O) Exhalation and local effects caused by movement may be worth considering if one wishes to contain contaminants in certain areas
Matsumoto and Ohba [10] experiment a movable heated object a full-scale room model \ The moving object mode and speed showed a significant effect on the air temperature distribution and ventilation effectiveness
Shih et al. [13] CFD simple object model an isolated room tracer gas (carbon dioxide, CO2) The removal of contaminants was not obviously affected by the moving speed
Choi and Edwards [15] CFD a realistic walking human model a Room–Room and a Room–Hall configuration particle The rate of mass transport increases as the walking speed increases, but the total amount of material transported is more influenced by the initial proximity of the human from the doorway.
Mazumdar et al. [14] CFD simple object model a single inpatient ward tracer gas (sulfur hexafluoride, SF6) The average concentration change in the breathing levels in the ward was generally small
Poussou et al. [11] experiment a moving object a one-tenth scale water-based model dye Human movement inside enclosed environments could significantly influence contaminant transport and personal exposures to contaminants.
Mazumdar et al. [8] CFD simple object model an airplane cabin dye/ tracer gas The movement of a crew member or a passenger could carry contaminants in its wake to as many rows as the person passed
Wang and Chow [17] CFD three different moving human models an isolation room expiratory droplets Human walking disturbed the local velocity field, and the increase of walking speed could effectively reduce the overall number of suspended droplets
Choi and Edwards [16] CFD a realistic walking human model a room compartment tracer gas (sulfur hexafluoride, SF6) Faster walking speed resulted in less mass transport from the contaminated room into the clean room