Numerical Analysis of Convective Heat and Mass Transfer around Human Body under Strong Wind
키워드:
Forced convective flow, Convective heat transfer coefficient, Virtual Manikin, Computational fluid dynamics초록
The overarching objective of this study is to predict the convective heat transfer around a human body under forced strong airflow conditions assuming a strong wind blowing through high-rise buildings or an air shower system in an enclosed space.
In this study, computational fluid dynamics (CFD) analyses of the flow field and temperature distributions around a human body were carried out to estimate the convective heat transfer coefficient for a whole human body assuming adult male geometry under forced convective airflow conditions between 15 m/s and 25 m/s. A total of 45 CFD analyses were analyzed with boundary conditions that included differences in the air velocity, wind direction and turbulence intensity. In the case of approach air velocity Uin = 25 m/s and turbulent intensity TI = 10%, average convective heat transfer coefficient was estimated at approximately 100W/m2/K for the whole body, and strong dependence on air velocity and turbulence intensity was confirmed. Finally, the formula for the mean convective heat transfer coefficient as a function of approaching average velocity and turbulence intensity was approximated by using the concept of equivalent steady wind speed (Ueq).
