Computational fluid dynamics numerical simulation of the heat transfer for the human body under various wind velocities and wind directions
In order to improve the accuracy of human thermal damage assessment in a disaster environment and ensure the safety of emergency rescue workers,firstly,a 20-zone computational thermal manikin was constructed using a three-dimensional body scanning technique according to the physiological structure of the human body.Climate chamber and wind directions(0°-180°)were set through ICEM software,and then the sensible heat transfer and radiant heat transfer at 0.2-5.0 m/s air velocities were calculated by FLUENT software.Finally,the convective heat transfer values were calculated through computational fluid dynamics(CFD)simulation and validated against the measurement and simulation results in the literature,and the influence of different wind velocities and wind directions on the human heat exchange was ana-lyzed.The results show that the heat transfer between the human body and the environment is promoted with the increase of air velocity.When the air velocity increases from 0.2 to 5.0 m/s,the whole-body con-vective heat transfer of the human body increases from 56 W/m2 to 360 W/m2.It is found that the large differences in convective heat transfer between the local body,and the heat transfer between the limbs and the environment are more obviously affected by air velocity.In addition,the wind direction has little effect on the whole-body convective heat transfer but significantly influences the trunk part.Asymmetric wind di-rection(45°,90°,135°)causes the distribution of convective heat flux asymmetrically.This study can offer basic data for personnel safety assessment,human thermal reaction modeling,and protective equipment re-search and development.
万方数据
维普
