Abstract
The human body is a heat source in a room. As the human body has a complex shape, it is difficult to accurately measure the airflow distribution around the human body using a conventional anemometer. This study measured the airflow distribution around a thermal manikin acting as a human body by visualization and particle image velocimetry (PIV). The thermal manikin was 1700 mm in height, and its surface temperature was set to 30oC. The experiments were performed in the conditions when the manikin was seated on a chair. The ambient air temperature and wind velocity were experimental variables. The airflow distribution around the manikin was reported by considering the relationships between convection and ambient wind velocity. There were no differences in the airflow distribution around the manikin due to the ambient air temperature when the wind velocity in the chamber was set as 1.0 m/s. Hence, it was assumed that the ambient wind velocity was dominant in this condition. Various airflow distributions were formed around the manikin due to the difference between the body surface temperature and the ambient air temperature in the case where the wind velocity in the chamber was set to approximately equal to 0.0 m/s.
Highlights
It was assumed that the ambient wind velocity was dominant in this condition
Various airflow distributions were formed around the manikin due to the difference between the body surface temperature and the ambient air temperature in the case where the wind velocity in the chamber was set to approximately equal to 0.0 m/s
In the case of the wind velocity in the chamber set at 1.0 m/s, the airflow rose around the thermal manikin
Summary
Gao et al calculated air flow, temperature, CO2 concentration distribution for seated virtual thermal manikin using CFD [1]. They compared CFD results with experiment at some points. Yousaf et al (2011) simulated and measured thermal plume around human head using thermal manikin with CFD and particle image velocimetry (PIV) [2] They measured air flow distributions around human head using two cameras of which measurement area size is about 500 × 500 mm. Cao et al (2014) measured air distribution around human body in aircraft cabin using PIV [3]. The airflow distributions around the entire body of a thermal manikin were measured by flow visualization and PIV. The air flow distribution around the manikin considering relationships between convection and ambient wind velocity were reported
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