Development of convective heat transfer models for human body segments for the case of displacement ventilation in rooms
To understand the thermal equilibrium of the human body in terms of thermal comfort, the investigation of associated human thermo-physiological processes is required. In this context several complex correlations need to be integrated, which leads to a conservation in terms of the energy equation. In this heat balance equation, heat transfer between the human body and its environment is described through sensible and latent heat losses. Existing studies mainly deal with one heat transfer coefficient to determine the whole body convection, not giving details about the various body segments. However, convective heat transfer coefficients vary significantly on human body segments in response to local air flow. Variable based convection coefficient correlations are developed for human body segments which characterizes most displacement ventilation flow regimes in rooms. The Computational Fluid Dynamics approach is used for modeling fluid flow and for predicting convective heat transfer between manikin surface elements and the environment.