Latent Heat Loss of a Virtual Thermal Manikin for Evaluating the Thermal Performance of Bicycle Helmets

TitleLatent Heat Loss of a Virtual Thermal Manikin for Evaluating the Thermal Performance of Bicycle Helmets
Publication TypeConference Paper
Year of Publication2019
AuthorsS. Mukunthan, J. Vleugels, T. Huysmans, and G. De Bruyne
EditorD. N. Cassenti
Conference NameAdvances in Human Factors in Simulation and Modeling
Pagination66–78
PublisherSpringer International Publishing
Conference LocationCham
ISBN Number978-3-319-94223-0
Abstract

Thermal performance of three bicycle helmets for latent heat loss was evaluated through a virtual testing methodology using Computational fluid dynamics (CFD) simulations. The virtual thermal manikin was prescribed with a constant sweat rate of 2 g/h and a constant sweat film thickness of 0.3 mm. The simulations were carried out at 6 m/s until convergence was achieved. The results from steady state simulations show heat loss of 158 W from manikin without helmet and approximately 135 W with helmets. However, the thermal performance of helmets with a sweating manikin has been reduced from 89–93{%} to 84–87{%}. These results imply that evaporative/latent heat loss plays a significant role in thermal performance of helmets. Therefore, thermal performance tests for helmets should also include testing of helmets for evaporative heat loss.

Research area: